Are you sure that cam is one of the later ones ground on the 108 LSA and not one of them ground on the 104 LSA?
The early ones ground on 104 LSA installed advanced to 102 ILC don't, won't, have much vacuum at 900 RPM idle speed, maybe 5.0 inches scope shruggy
Did I tell you I hate those Purple Shaft cams down

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)