Turbo head build

I think the OP needs to buy a copy of Dutra's slant six performance book. Then he should go over to the turbo forum and search for anything from Bill Dedman. This will lead to other slant six turbo builds. All of which will explain exactly what he needs to do.
If I was going to build a slant six with a turbo, I would be talking with Charlie S.
Charlie has the time slips to back up the fact that what he builds actually works.
Charlie is, like Doug Dutra a Slant Six.org Hall of Fame member in recognition of Charlies success in building and racing slant six motors.