[lippy]

I don't think a four window PV will make a difference. The PCVR controls how much fuel you get with the PV open. The PV is just a door that opens at a specific vacuum. As Gaz said, the standard PV is adequate for any PVCR, so it's not a limiting factor.

Btw I bought a Braswell carb awhile ago. Worth every penny. The best part is that you can get tuning advice from Dave Braswell, who is one of the best carb guys on the planet.