Re: What to build? 383ci. ~vs~ 406ci.
406. Make REAL sure the person doing the machine work knows what he is doing. Failure of 400 blocks has more to do preparation than any structural flaws. Must be plate honed properly. Must be balanced properly. Must be line honed properly. Don't take to the guy on the corner just because he is close. Shop around and find someone with a good reputation. Like you said, you don't want to do it over. If in doubt, send it to one of the guys that invest their time in this site. JMHO. You can read about satisfied customers on this site. You can also read horror stories about Bill Mitchell and his ilk. Go where the satisfied people are.
What size chambers in your heads?
If you are serious about the turbos, I'd go with a 350 block. Better gasket grip between the bores. Any size engine will make any amount of power with a turbo. A 1000 hp 350 is not unusual. When you get to those power ranges, any detonation can cause gasket problems.
406 SB, Original Bill Thomas '63 Rochester FI
AFR 210, Lunati 501C2LUN, 255/263@.050", .628"
10:1, TH400, 3.31's, 4400 SS
"Life is too short to not run a solid roller cam."
"Nothing is impossible; if you don't know what you're talking about."
Last edited by kirkwoodken; Aug 8th, 07 at 6:32 PM.