[tekuhn]

Hello,

I am building an engine using an NOS RA-IV block and Scat 4" stroke forged crank. I'm using Mahle-Clevite MS-496P-STD main bearings and my clearance is coming in at about .0015" which is too tight. As the crank is brand new and the block is NOS, I'd really like to avoid taking it to a machine shop. Are there any bearing manufacturers that offer oversize, or is one manufacturer more likely to run on the larger size than another?

Any other tricks that might gain me a thousandth or so? Would running a 0.001" stainless steel shim under the caps be out of the question?

Thank you for any advice!