A holley 2300 500cfm will do just fine. Just don't drill your PVCR 's too big from the start. MBHD recommended you a great turbo. You will have to get a AEM wideband to tune it properly. You must be able to cut and weld exhaust tubing or pay out the nose for custom work. Run the Offy intake. Keep in mind, 15 psi is a whole lot for these engines. I run around 4-5 psi and have been up to 10. Forged pistons are $$$, if you can properly manage detonation, cast will do just fine. The stock cam will work well with a turbo. I did a custom turbo cam, but think it was overkill. Keep in mind about your fuel system and how to boost reference it. I am running a stock mechanical fuel pump that is boost referenced. Any more boost in my setup, I would need to change to a electronic fuel pump/ regulator setup.
Good luck, it's an awesome ride!! There is nothing like the sound of a blown inline 6.
Boucher'
PM me if you would like a build sheet to reference.
