Stock 400 Piston Boost

Probably, but GAWD I HATE that stuff. I know how to wire it, I know how to use it. I've done it a good bit helping other people but I hate it. But you're right. That's gonna be the best way to handle it.
You don’t really need all that stuff but an MSD 6btm is a good idea. It allows you to pull timing in relation to boost and also keep a curve in the distributor that will make the engine completely docile when not in boost. You can do it with just a curve in the distributor (like 12 degrees initial and 28 total) but you loose a lot of the drivability.