Oh, I’m very familiar with Chevy small blocks… It’s just the horsepower difference between 307 to 350… Strapping a rocket on a skateboard… The 307 was no slouch either, or the 327 as well. Even the old 283 would’ve been monstrous in that thing
I had a 69 Chevelle SS droptop with a 396 and a four-speed in it… Paid 375 bucks for it, thereabouts, in 1977… Boy, those days are gone for sure…
I had a 57 Chevy with the 283 Power Pack 4 barrel but it had an Edelbrock Torker intake and Holley 4 barrel, some hp cam of unknown make and unknown lift/duration and headers, Accel distributor and Super Coil.
The power that engine made was incredible. It was 100% stock inside other than the cam.