Any Pontiac guys on here? Need insight.

Bewy said
Post #42. Pic of the oil pump drive shaft. Rough end is quite normal. If you look closely, the last 3/16" of the shaft is smooth...& slightly larger in OD compared to the rough area. The body of the Pontiac dist is a tight fit in the hole, to a depth of about 2.5"; no way it can move around to rub on anything. The gear on the dist shaft is recessed so that the smooth end of the pump drive is a tight fit inside the gear to locate & centre the drive shaft.

I ran the oil pump this morning and it is not screaming so, that's out as a possibility. There is really no oil to speak of getting up the rockers. Pulled 2 lifters and push rods out and it will shoot a 3ft gieser of oil out of the lifter bores so, it's getting plenty of oil to the lifters. Checked the pushrods and they are clear so, we took a lifter apart. First thing we noticed is, the lifter would not collapse at all to be able to remove the clip from the top. Once we finally got it apart it has a solid disk behind the cup of the lifter so, now correct me if I'm wrong but, on an engine that oil through the pushrods this disk should have holes in it to allow oil out of the cup and up through the pushrods??

Here is a picture of the disk behind the cup.