Mopar 318/275 HP vs. Chevy 327/275 HP 'L-30'
I disagree about the 327 ALWAYS winning.
I put down many a gm 350 with several nearly stock 318s.
Yep, Mex 318 with factory 4 barrel was rated 270 and had "270" badges.
IIRC, was 1971/2-ish.
Don't know what other specs are, but could be 340 cam and /or better compression.
Came in A body Super Bees among other things!