I have a used enhanced GZ on the race car now, it didn't pull much vacuum ,5.0 or less : on the old motor whiney
I have both a 3 and 4 vane used Moroso pumps that I will try this year on the new motor that is built for a vacuum pump, I'll post my results as they happen luck

Last edited by Cab_Burge; 04/28/19 12:58 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)