What did chevy do so right to get such a huge following? Is the horsepower potential that much greater with a chevy design?
It's called marketing.
GM marketed the hell out of what Smokey Yunik called a relatively reliable high speed turtle.
Look at all the [censored] wrong with the SBC. The deck is too short. Pan is too narrow. Cam is too low. 23* valve angle. Smaller bore spacing. .842 lifter. Ball and stud rockers. Want me to keep going?
Every time a limitation came up, the rules were changed to fix the junk GM was peddling.
Marketing works.