Nothing wrong with a poly or wide block 318 if you have the right car to put it in. But IMO not A body. Tough to find parts for it and it is WIDE!! O yes and HEAVY. The head design is a pre Hemi thinking design. Not bad with right vehicle. I had a 61 fury 4 door with that engine, wide block 318, and believe me in that boat no one would use the word performance to describe it.