Quote:
Originally Posted by MarkS57
X2 on the ‘68 -‘70 350 heads or as this year 350 should have large valve heads stock, maybe 16 / 62 / 12 / 13's. Only thing about these heads is there is no upper boss on the heads for the stock alternator / power steering mounts of the '75. So the accessory mounts would need to match the heads. Your going to tear off the front & top of the engine anyway so...  |
It sounds like you do not want to swap heads but if you do, I'd remove 70 350 heads (#11) from your list as there are better options for increasing the CR. #11 heads have been discussed on here before and the reality is they're estimated to deliver maybe 7.9 CR in stock form, not the advertised 8.8.
I put a Summit 2800 in my stock 350 but haven't driven it since the swap so can't comment on power increase over stock, nor alternative cams. I do know that I'd replace the heads if I wanted significantly more grunt, and I also know I chose not to spend that time and money until I drove the car. The simulations predict increased power with my swap and that's better than less!
When I drove the car with the original cam and 2bbl, it still had a lot of low-rpm torque
for what it is. Not tire-burning torque, but it felt like more power than some other V8 cars I've owned, especially considering it is pushing a heavy car around pretty well...and that was at 5200' elevation.
So I'll be interested in what you learn and what others are saying in this thread.
Mike