The old 69 i bought had about 20# oil pressure driving and 5# idling when i bought it but after about 10 miles it was near zero. I finally had a chance today to install a Melling High flow oil pump and i thought i had it licked. Cleaned the pickup out and flushed the pan good. Started it up and it had 25# right away so i pulled it outside to let it warm up. Went out 5 minutes later and the oil pressure was about 5#. Took it for a drive and can get 25-30# out of it but go to idle and it goes to 5# I did plast-guage some of the rods and mains when i had the pan off and the rods were between .001 and .0016, The mains were between .0021 and .0025. Thats a little looser than i would like but not terrible. I am running 15/40 synthetic schaeffers and 1 bottle of Lucas BTW. I guess the problem must be crappy cam bearings right??