This is an interesting question of 360 vs 383. With the intro of affordable speed parts that began about 25 years ago for mopars its really a wash. Today and relatively speaking the affordable stroker kits, aluminum heads and assortment of Hyd and solid roller cams is the determining factor. Even though I could probably afford a stroker mopar engine with aluminum heads I still like to look at this comparison being that one is using most of the factory components. 318 will run did not state we must stay within this parameter but I am thinking out loud. Taking 2 sound healthy bones stock engines- Ill say like 1972 to 1985 360LA and a 383 built between 1967 and 1971- utilizing the OEM heads, block, crank and pistons- or replacement EXACT equivalent pistons- I believe history shows the 383 to be superior. I remember in the 1980s even SBC guys did not run aluminum heads and stroker kits even though they were available- Was $$ for chevy guys back then as well. Mopar didn't have ANY AFFORDABLE aftermarket head for a street engine build. The W2 program was great but $$$$$$$$$$$. Offshore manufactured parts have allowed all these fun go fast parts to be accessible by the gear head masses. I'm not bragging up or praising China- but it is a fact that products being initial produced over there have made said products available to us which was UNHEARD of in the 70s 80s and 90s.