408" with 6-8 lbs boost

I don't see where there would be a problem. There are a lot of nay sayers, but most of them have not built a boosted engine. You don't have to get to extravagant for 6-8 lbs of boost. A stock forged crank, forged pistons and rods and you are good to go. Get the machine work done on the block and heads at a good shop and no worries. I have a 340 with a 6-71 that I built myself running 6-8 lbs of boost most of the time and when I want to step it up I can to 10 lbs with w/m injection. I run 31 degrees of timing with either setup and never had a problem. It doesn't have to cost a fortune either, I did mine for about $4000 all in. You just have to jump on the bargains when you see them. Heres a link to my build if you want some ideas or just some engine ****. Project 6-71 340 Demon

Jack