Again cam retard needs to be 0 or close to. Mine was at -9 and at 2000 rpm overdrive i had a random misfire and bad mpg. Got the cam retard to 0 and truck was back to normal.(1997 two door tahoe 5.7) if i was you i would try to set at 0 before putting more parts on.
http://www.ebay.com/itm/BILLET-vortec-V8-5-7-350-5-0-305-7-4-454-distributor-/320605212568?pt=Motors_Car_Truck_Parts_Accessories&hash=item4aa58f4f98&vxp=mtr
anybody running one of these??? good or no good??? thanks