Be careful when you mix and match Ford parts as noted above. You can do it.....just do your homework. There are different features for various years of blocks.

Start with the block and work out from there. The best smaller block is the 67-70 302 or the mid 85 and up 5.0 is even better if you get the roller cam. The 351 W is good too, but has a higher deck height that can create clearance problems in tight motor compartments.