[Baaad65]

Have the shop put in main studs then 2 bolts are good enough that's what Butler did to my 461, it's not like you're going to be spinning it above 6000 rpms...are you?

 

[Baaad65]

If you haven't already go on Butler's site under the tech tab where they have all kinds of charts for cubic inch combos and compression calculators, motor identification, they have all the rotating assemblies you could imagine. It's fun to dream what you could do but make sure you're sitting down because they ain't cheap but they're probably the best in the land.

 

[Baaad65]

I'm no expert but I don't think that's the best choice of an intake for what your intentions are...going to hurt the low end. I think that manifold is rated for 3000- 7000rpms without checking and is pretty tall so hood clearance could be a problem depending on the air cleaner. I'm running a Performer RPM with a 1/2" phenolic spacer on my 461. Just my thoughts.