318's thicker ?
You guys hear of texting ? This is text posting, lol
I think he is asking if any 318 have thicker walls, maybe but only the very early ones, 1970-71, etc. No magnum motors, those are thin, thin, thin wall.
But with only 2,400lbs to push and eddy heads, I think you have gobs of power with 3.94 bores.
How your going to hook up the 5 speed trans, last I knew its not a direct fit. Hope you can get a strong enough clutch for it.