TT Dart -- Brainstorming

I'm trying to come up with a budget build twin turbo engine for my Dart. I intend to do all of the work myself. The Dart is a cruiser basically, may see some strip time.

What I have:
Several complete 318s
1 complete 360 ('78 block I think, needs pistons, crank turned, and bores cleaned)
3 sets of J Heads, all of which have sunken exhaust valves.
A variety of exhaust manifolds
A couple 650 cfm holley 4bbls
A couple thermoquads

Goal:
400+ rwhp

Current idea:
318 short block (didn't some years have forged cranks?)
360 heads (587 cast, have hardened valve seats and larger valves/runners than 318)
Convert the holley to blow through
Use rear dump manifolds backwards for a front dump setup
Twin turbos of course

The reason I'm currently thinking this combination is, I have usable 318 short blocks which should be capable of high revs, the larger heads should allow more air to be forced in, holley because I already have it and from what I understand, the conversion isn't expensive or difficult.

What do you think?
I'm not sure how to go about choosing a turbo. If I could find a couple working ones in the junkyard, that would be best to help keep cost down.