I just bought a complete (carb to oil pan) 400 sbc casting #3951511 complete engine from Craigslist for $500. It's a 1971 265HP version out of a 1971 Impala. It has the original heads on it that I've heard are crappy for performance. They are 76cc chambers. It has a Pete Jackson gear drive, Blue Racer 1.6 Aluminum roller rockers and some kind of performance cam. I haven't pulled the pan to see if it's a 2 or 4 bolt yet. I have a fresh set of camel hump heads that I was thinking of putting on it after I have the steam holes drilled. I'm only looking to make around 400-450hp. What rods and pistons are good for it? I'm on a low buget and have lots of 350 parts laying around. Can I use some of them in this motor? Thanks for any help you can offer.