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To me it would depend what car it's going in and what it originally had as a motor. for eg. on an original 383 RR, I'd definitely go with the 451: if it was going in a GTX or Coronet R/T, I'd use the 440.

You probably don't care so 451 vs. 440 then the 451 wins.......but you could always stoke the 440.

Dave





I'm going with a 451 stroker in my numbers matching 383 Road Runner. The 383 will go into safe storage to make way for 451 cubes while the 383 hood call-outs and air cleaner pie pan remain

A 451 trumps a similarly built 440. Yes, you pay a little more for machine work but the added cost gains a lighter crankshaft and lighter pistons. Oh! depending on how much compression you want, you may have to pay more for pistons as well; I will.