Slant 6 work truck

As for wastegates, you’ll be fine with a 38mm but you can go larger. A quality wastegate that isn’t a counterfeit is important. There isn’t really any benefits to a wastegate. If you have your turbo sized to your engine correctly (225 ci @ 10 psi @ 4500rpm) you’ll barely use the wastegate at all. I have a 38mm tial wastegate and at 62mm compressor, .84 a/r, I put the lightest spring in for tuning and I couldnt get 1psi of boost out of it.