lifter oil galley lifter help needed

I had the same problem. Another option would be to block the oil at the #1main feed leading to the drive side of the lifter galley. Under the # 1 main bearing saddle are three holes, drill and tap the one hole which leads to the lifter galley on the driver side (odd cylinders) (1/8" pipe plug.). My problem was the #5 exhaust and the # 7 intake lifters. I lost oil psi and eventually the engine. After the above fix the engine had good oil psi and worked well.... Until the crank broke...(cast crank... Bad choice) next part of your question, because the lifters are roller design not much oil is required. The rollers will receive enough oil by " splash" and the lifter body will receive enough oil from oil return back to the pan from the valve train and some leakage around the cam journals themselves. Hope this helps some.