I have a Cummins era Siamese block in the rebuild stage. I’ve done some research but finding limited info. Is there a main stud kit available from anyone? I found one for a world block, not sure if it would interchange. Is there an off the shelf 4.5 bore ring set ? Found stuff listed for Chevy stuff. A bore is a bore ?? Need 1/8 1/8 1/16. Builder prefers Totalseal.