I`m running a 750 barry grant demon on my 454 with 373 gears `72 chevelle. Any body have any similiar combinations? There are alot of adjustments that can be made on this carb but the one I`m most interested in is what spring to run in the vacuum pod? any one tuning these babies out there?? Let me know any secrets.

Its basicly the same tuning as a holley, and for the most part they use the same tuning parts (jets etc). Its recommended that when swapping vac sec springs, you use the lightest spring possible that doesnt make the car bog. You dont want to be able to "feel" the secondaries open.