Sep 13, 2011 · I am posting this for a friend who is wondering if he can use his older 350 block with vortec heads.He says the block is stamped with the #3970010 on it.Can anyone let me know if this combo will work?I believe this block was made in the late 60s and early 70s.

Apr 8, 2011 · Hi, I think that instead of going ls-style retro in my car, I'm seriously considering just building a sbc 400 that I have. It's a 509 block engine. Here's what I was thinking. Rebuilt bottom end with splayed 4-bolt caps, forged crank, pistons and h-beam rods. Was looking at fast burn...