360 vs 383

318willrun said

So I had a few key things in mind when I created this thread..... I'll throw one of them out there...

360 allows the choice of either 904 or 727. I am a huge fan of the 904 in A-bodies. Lighter, fits better, more room around the headers. 904 is not an option with the 383 without a very expensive adaptor.

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If using a 904 is an option, in the mildly hopped up scenario I might say its a tie or down to personal preference. I'm not sure if the lighter transmission and reduction in drivetrain losses completely make up for 23 extra cubic inches, but the extra room in the engine compartment will sway plenty to opt for the small block vs the big block. I would still go big block lol, but not for objective reasons.