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Oil presure before the dyno run had always been 80-90psi at idle cold and 23psi when warm, driving was around 70psi
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I think that you cold idle
oil pressure is way to high at 80/90 ps...you'll see most engines of similar components is the 35 to 45 cold psi range........
hot
oil pressure at 23 psi is o-k,at high rpms, 70 psi is what i would consider the max, anything from 50 to 60 would just fine......
Also, way too much differential between the cold/hot readings, as someone already said, you may have already had bearing problems.......
to compare, my 331 race engine running 15/50 Mobil 1, cold idle,just a tad under 40 psi, hot idle, just a tad over 30 psi, at anything above 2000 rpms, from 50 to 60 psi max........7000 rpm chip in the MSD box......
David