Quote:

... in the real world nobody would build one of each with identical parts anyway, would they?


Does a Chevy-oriented magazine count? IIRC, I may still have copy of one where they actually built two versions of the same SBC engine, one as a 383 (3.75" stroke + stock bore) and the other as a 377 (stock stroke + big bore) to see the outcome. (Even the same cam was used, which IMO means if it was "right" for one of them, then it was also "wrong" for the other. )

The two engines performed pretty much as people would expect w/ the 383 making more torque and the 377 pulling a little more peak HP. From what I recall, the differences weren't major, yet fairly predictable.