the way i see it the closest thing to them old school engines are the LS engines these days. 6.0 i had in my 03 truck, a 364 iirc has 300 HP stock. the new ones have more HP. its what replaced the 350 we all loved so much. and they had what 170 stock to 190 ish?

now that i think about it, my formula 400 had a YS code block, 350 hp and that was a 400 engine. so the HP is getting much better from the factory with these new engines.

them turbo regals were something else. a friend had one.