You are taking me back! My 1st Mustang (and engine rebuild) was a 67 Black 289 4 spd Fastback. Bought it at night (a mistake). In the daytime, I saw the smoke screen behind it!
Did new rings and rod bearings and sent heads out for a valve job (w/o removing the block). Put a 600 Holley on it and dual exhaust with Thrush mufflers and I thought I was hot stuff! Used to pal around with my friend who had a 69 Z-28 all the time. The Z was faster, but he was furious that I could beat him 0-50! Those small block Fords had good low end grunt!
I think if I had a Hi Po motor, I would have given him a run for his money!
For those who don't know, the only difference between a 289 and 302 is a slightly longer stroke, block and bore size are the same.