Husqvarna CCC Ebay Store Shop HL Supply Shop Performance Muffler Covers

rebuild 302 or swap in 351?

Discussion in 'Off Topic Area' started by wap13, Aug 23, 2022.

  1. wap13

    wap13 Super OPE Member

    Joined:
    May 20, 2018
    Messages:
    169
    Likes Received:
    268
    Trophy Points:
    123
    Location:
    Ga
    Local Time:
    2:19 AM
    I know there are some ford guys on here so....

    I have a 91 F150 thats pretty well worn out. I need to put an engine in it. I've never liked the 302 thats in it but to be fair I got the truck at least 3rd hand and it never ran very well for me, so I'm not sure what a fresh 302 would feel like. I always wanted a 300 or 351 as its a farm truck and I need the low end torque off road more than hp on the road. Side note, I have a 300 from a 92 I could build or use as a core if thats a viable option but being a different platform all together (i6 vs v8) I assumed a 351 swap would be easier. Mainly in the wiring and ecm.

    Anyway, I can put a crate 302 in pretty cheap and easily OR look for a 351 and install that.

    My question is, if I find a 351 of the same vintage is it pretty much a bolt in affair or is there more to it? Would the computer work for a 351 or would I need to get one for a 351? I could swap to a carbed 351 but would just assume stay efi if possible.

    Truck is a 5 speed and I swapped in a zf5 years ago (best thing I ever did) if that matters.

    Thanks for any input
     
  2. Woodslasher

    Woodslasher Teh debil

    Joined:
    Mar 18, 2021
    Messages:
    2,287
    Likes Received:
    7,748
    Trophy Points:
    325
    Location:
    Commiefornia
    Local Time:
    11:19 PM
    My two bits, my dad had a 1993? ish F250 4x4 with a 351, he said that thing was so much of a dog he sold it and kept his 69 F250 with the 390. I can get more details later but for now I just know that the 351 was very underwhelming in his opinion.
     
  3. Tim N

    Tim N Super OPE Member

    Joined:
    Jan 8, 2016
    Messages:
    213
    Likes Received:
    360
    Trophy Points:
    128
    Location:
    Illinois
    Local Time:
    1:19 AM
    I had a 1990 f250 with a 351. Most underpowered truck I ever owned. I ended up dropping a 460 in it. Alot of work but well worth it.
     
    Dub11, jacob j. and Woodslasher like this.
  4. wap13

    wap13 Super OPE Member

    Joined:
    May 20, 2018
    Messages:
    169
    Likes Received:
    268
    Trophy Points:
    123
    Location:
    Ga
    Local Time:
    2:19 AM
    I appreciate the input. If yall think the 351 is bad try a 302.... I'm not doing a big block. The truck is a single cab short bed and very light. Plus my zf5 is a small block. I dont doubt the 351 was lacking in 3/4 ton trucks, especially IF they were autos. Now days the autos have come up to speed but comparing any engine with a standard trans and something like a c4, e40d, etc really isnt fair.

    The truck is a true beater too. I kind of hate to put any money into it but it keeps me from beating up any of my "nicer" trucks. And while we dont have salt on the roads down here I do put out mineral and salt for my cows and I hate getting that on anything else.

    Again, thanks for the .02
     
  5. JimBear

    JimBear Here For The Long Haul!

    Joined:
    Aug 23, 2018
    Messages:
    2,153
    Likes Received:
    12,460
    Trophy Points:
    445
    Location:
    IA
    Local Time:
    1:19 AM
    I had a early 90’s F-250 with a 6 cylinder & a 5 speed. We mounted a bale spear on the back & I hauled 1500# - 2000# hay bales with it & pulled a 16’ livestock trailer with it. It wasn’t a power house but worked effectively as a farm truck.

    I also had a 96 F-150 with a 302 & auto trans, it ran to 296k before the frame rusted out & engine crapped out.

    My current 97 F-250 has a 351 & auto trans, definitely not a powerhouse but serves its purpose as a farm truck hauling wood & pulling trailers.

    I had/have no problems with torque in any of them that’s what the low range is for.

    That said I would either stick with the 302 or go to the inline 6.
     
  6. Kiwioilboiler

    Kiwioilboiler 346 Pic Examiner

    Joined:
    Apr 20, 2020
    Messages:
    6,598
    Likes Received:
    36,789
    Trophy Points:
    495
    Location:
    Marsden Pt, NZ
    Local Time:
    8:19 PM
  7. Maintenance Chief

    Maintenance Chief Disrupting the peace with an old chainsaw

    Joined:
    Jan 4, 2020
    Messages:
    2,966
    Likes Received:
    9,249
    Trophy Points:
    340
    Location:
    South Carolina
    Local Time:
    2:19 AM
    Im a big fan of the strait 300 for work, with a stick they are a real work horse.
    If you do go 302 or 351 a set of HP heads from a mustang or 1969 small chamber 351 heads are a good way to wake the up.
     
    Dub11, jacob j. and JimBear like this.
  8. wap13

    wap13 Super OPE Member

    Joined:
    May 20, 2018
    Messages:
    169
    Likes Received:
    268
    Trophy Points:
    123
    Location:
    Ga
    Local Time:
    2:19 AM

    Always wanted heard that about the 300, hence why I'd like to try one. Just not sure if the swap would be worth the hassle. Other than engine mounts and some of the wiring I guess I should look into what else is involved in the swap.
     
  9. blades

    blades Super OPE Member

    Joined:
    Aug 30, 2018
    Messages:
    201
    Likes Received:
    281
    Trophy Points:
    123
    Location:
    Leroy, WI
    Local Time:
    1:19 AM
    Those 300 6's are in just about everything. there were 2, 351's one was a longer stroke than the other. been so long think one was a cleaveland and the other a winsdor. the long stroke was for heavy trucks and some other commercial equipment.
     
  10. JimBear

    JimBear Here For The Long Haul!

    Joined:
    Aug 23, 2018
    Messages:
    2,153
    Likes Received:
    12,460
    Trophy Points:
    445
    Location:
    IA
    Local Time:
    1:19 AM
    In the older Fords, 70’s - 80’s there were three types of 351’s. If I remember correctly they did away with the M’s & Cleveland’s but I may be mistaken.
    The Windsor hung around until the 90’s
    The Windsor, Modified & Cleveland.
    Windsor was a small block
    Cleveland & Modified were a large block, they made a 400 & 351 modified.
     
  11. wap13

    wap13 Super OPE Member

    Joined:
    May 20, 2018
    Messages:
    169
    Likes Received:
    268
    Trophy Points:
    123
    Location:
    Ga
    Local Time:
    2:19 AM
    Surprised the 351 aint getting any more love. I would be looking at a windsor from the same vintage of truck. No need to try to make a cleveland or modified work.
     
  12. Funky sawman

    Funky sawman Pony Power

    Joined:
    Feb 10, 2017
    Messages:
    2,136
    Likes Received:
    7,916
    Trophy Points:
    345
    Location:
    North idaho
    Local Time:
    11:19 PM
    I'm a big fan of the 351. It's all in the gearing, with proper gearing it will pull good. Most f250 with Windsor had 3.54 gears which sucked for towing. My f250 with 3.54 gears works great because it's sporting a 460 4 bbl. The Windsor has a taller deck hight than 302, and I think the flywheel is weighted differently. Not sure if front accessory brackets will swap with the different deck hight.
     
    Woodslasher likes this.
  13. Maintenance Chief

    Maintenance Chief Disrupting the peace with an old chainsaw

    Joined:
    Jan 4, 2020
    Messages:
    2,966
    Likes Received:
    9,249
    Trophy Points:
    340
    Location:
    South Carolina
    Local Time:
    2:19 AM
    I think it's really about yoir intended purpose for the truck. From what I read it's more about farm work and thats why I suggested the 300-6 .
    If you needed to get somewhere fast I'd suggest the 351 Windsor or early Cleveland ( see Boss motor) . Hell even a warmed up 289cid can put out 271hp at 475 pounds !
     
    Funky sawman, ElevatorGuy and JimBear like this.
  14. ElevatorGuy

    ElevatorGuy It’s up and down ;)

    Joined:
    Jan 5, 2021
    Messages:
    791
    Likes Received:
    2,258
    Trophy Points:
    235
    Location:
    Maryland
    Local Time:
    2:19 AM
    If you want it sporty rebuild the 302, building it for a work truck throw a 351 with a mild cam and a shorter rear gear.
     
    Funky sawman, mrsmith66 and JimBear like this.
  15. Duce

    Duce Here For The Long Haul!

    Joined:
    Feb 6, 2016
    Messages:
    1,696
    Likes Received:
    5,464
    Trophy Points:
    354
    Location:
    Roscommon, MI
    Local Time:
    2:19 AM
    Just drop a Ford voodoo V8 in it, that should work for work and fun.
     
    Hinerman and JimBear like this.
  16. Steve

    Steve Excellence! GoldMember

    I Support This Forum as a Gold Member!
    Joined:
    Jan 21, 2016
    Messages:
    7,485
    Likes Received:
    39,539
    Trophy Points:
    519
    Location:
    Missouri
    Local Time:
    1:19 AM

    Ok Adam, I'm here now!


    So the stock computer system is very basic and can barely compensate for 10% +/- airflow differences. So you would have to use a 351 computer if you swapped in a 351. The 302 computer could not support the fuel requirements for the extra displacement. Keep in mind that none of the truck engines from this time period were hot rods. They have one job and that was to haul loads reliably. Speed of hauling was last on the list.


    I have been driving an 88 f150 300 5 speed daily for almost 6 years now. It keeps up with traffic just fine and hangs with everyone on the highway too. It is the lowest hp engine at 150hp brand new! The 302 has a bit more hp, I think 165ish? But shares the same torque at 260ft-lbs with the 300. The 300s have their weaknesses though. Everybody lugs the *s-word out of them because of their high torque at the expense of the bearings. High load at low rpms means low oil pressure and premature bearing wear. There are also 13 bearings on the crankshaft. That is a lot of areas for the pump to lubricate. Good rule of thumb is to keep it over 1500rpm when driving and you will have plenty of oil at the bearings. Here are the bearings out of my original engine with 112k on them! Grandpa liked to lug it.

    PXL_20210829_185527237.jpg
     
    I saw a lot, jacob j., wap13 and 5 others like this.
  17. mrsmith66

    mrsmith66 Well-Known OPE Member

    Joined:
    Aug 13, 2022
    Messages:
    20
    Likes Received:
    33
    Trophy Points:
    53
    Location:
    Michigan
    Local Time:
    11:19 PM
    @Steve do you know what oil your grandfather used?
     
  18. Steve

    Steve Excellence! GoldMember

    I Support This Forum as a Gold Member!
    Joined:
    Jan 21, 2016
    Messages:
    7,485
    Likes Received:
    39,539
    Trophy Points:
    519
    Location:
    Missouri
    Local Time:
    1:19 AM

    He bought this truck brand new when I was 2. I'm sure every brand was in it at some point. My salvage replacement engine was the same way. No idea on milage or oil history. My rebuilt original engine runs Valvoline 5w30 synthetic.

    PXL_20211014_121409198.jpg
     
  19. Sagebrush33

    Sagebrush33 Pinnacle OPE Member GoldMember

    I Support This Forum as a Gold Member!
    Joined:
    Feb 19, 2021
    Messages:
    1,439
    Likes Received:
    4,037
    Trophy Points:
    255
    Location:
    Upstater
    Local Time:
    2:19 AM
    l6 for the win here. Great on fuel too.
     
    Lnk likes this.
  20. mrsmith66

    mrsmith66 Well-Known OPE Member

    Joined:
    Aug 13, 2022
    Messages:
    20
    Likes Received:
    33
    Trophy Points:
    53
    Location:
    Michigan
    Local Time:
    11:19 PM
    Repeatedly starting an engine in sub-freezing temps with budget oil that flows like molasses will make the bearing look like that in 100,000 miles.
     
    Steve and Lnk like this.
Loading...

Share This Page

Loading...
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice