225 turbo headers

The key to making power is not high boost figures. That's only resistance to airflow you read anyway so once you max the exhaust you can have 15, 20, 40 psi and it won't make any more power. I've got a couple ideas about working a /6 head a bit to get the air in and out. So what I'm running through my head is not a huge turbo - something that is responsive that with the ported head can give me 6-8psi. I've looked and found some used performance turbos for sale for reasonable money (under $500 now but $2K+ new). I'm thinking either cut up a factory manifold like Dutra only make the flnages point to a better spot and not a ball/socket flange, and possibly the EFI from a Ford 300 straight 6. Those are cheap and can make use of all the larger components made for mustangs, which are also cheap. It may just be a pipe dream, but who knows. Pistons are not a concern at this point for the reasons noted above. Now if I can only get this 225 I'm trying for now...lol