Go with an 8.5 or 10.5 pv if you have that much vacuum just to get it driveable. Then once you can get it to cruise in drive you would devide the vacuum at cruise to figure the proper pv size. No real need to get the wide band system. Plugs are a fine indicator.

Last edited by Hollow65; 11/04/2014 5:14 AM.
I can explain it to you, I can't understand it for you.