who is running MRL (BAM) Lifters without lifter bore sleeves

My car is many a street car
340 20 over
379 stroke off set cut
comp star rods H beam
Ross piston
10.3 compression
W2 race heads
Noris rockers
585 cam I believe to look cam card (more of a Street cam) solid roller
Oil trough head
MRL (BAM) lifters was told by Mike at MRL that I did have to bush them. But know I should have.
lifter bores are not bushed
motor has only ran for a short time
Low oil pressure at idle 12 at idle and 45 giving it gas climbs slow definitely something wrong. Ryan at SD said it the lifters that he has seen this.
Trying not to pull my motor out and tear it down. So far I think 828 is the fix. (if it is my lifters still have to inspect)
T