duster340, it's a BDS 6-71 huffer set up to run 6.6% overdriven, 5.5 - 6.0 Boost, 11.5 final compression ratio with 8.0:1 pistons. I figured that would be a safe start. Using two Holley 600's also.
Those are factory spool mounts in the photo. I'll probably go the polyurethane route too...