Just a thought: there is a blown variant that has not been used to my knowledge, and which has several advantages:
1. you can make the mounts with a band saw
2. you only need to buy the "head unit", which is not engine-specific
3. any good exhaust system will work
4. the stock rocker arms, cam, head works OK
5. strongly recommended: forged piston, better rods
What is it?
ATI Pro-Charger, which attaches in the same line as your accessories (alternator, power steering) belt-driven, discharges right through a common Clifford, Offy, etc. intake manifold - you only need a small adapter.