I am rebuilding a 1970 455 with the 1/2 inch pick-up tube and I got a hold of a newer 5/8 pick-up. Would it do any good without drilling the block to 5/8? I am not taking bottom of engine apart so I do not want to drill. I heard the 70 has oiling problems. I would appreciate any help. Thanks!
tube Won't help much,but can't hurt.You still have the restriction of the smaller diameter oil galley from the front of the block.This could be drilled without motor removal or danger of getting debris into motor. You'll need to remove radiator and front cover,but it can be drilled out from the front with a 11" long bit,then jack up the motor and drill the hole where the pick up is bolted on,its a little hassle but worth it,don't want to do much higher rpm stuff with the stock oiling system.An interim fix instead would be to increase current oil pressure by using a larger pump,a booster plate,and/or an adjustable pressure regulating bolt. gary
The oil passage is outside any internal portion of the motor,with the pan off everything will fall to the ground.When finished blow out any particals with air.I've done this mod several times without removal. gary
For lack of a decent 1/2 inch pickup tube I installed a 5/8 on an otherwise half inch engine. Ten years later this has not been a problem.
