I’ve got an oem jug (somewhere) if you need it.
I know you said that the scoring is mostly on the ex side, but I betcha that was straight gassed. Probably lived for a bit if your friend was using a decent oil, whatever residual was in there let it last a bit.
The flow through the ports is fascinating. I’ve done just what you did as well many times. You explained to yourself why OEM cylinders cannot be beat. Most of the finesse in them is hidden in the transfer tunnels. I’ve yet to see an AM cylinder beat an oem one. It would be a rarity if one did, though I do recall some hyway jug being great here for someone (372?).
Meteor jugs won’t flow as well as oem, but they do have decent QC. They have plating that exceeds oem specs and is nearly impossible to machine or grind. Anyone remember the 046 jugs
@Definitive Dave gave away with the odd intake ports? Many of us used them on builds never to do so again. The plating was made of kryptonite.