i had a set of BCR 2 bolt main caps on my W5. He made a small run of them years ago so there are some floating around out there. Rod at BPE bought mine. They were not pretty, and we had to do some work on them before we used them, but our 9.8 mill ran great and the main bearings always looked ok. Personally I think you'd have better luck running the Pro-Gram or Milodon cap, but only utilize the two bolts.