We went through this on my 302. We tried pressing in a thicker "Best Seal" with .010 shim on both sides and pinning the seal. We knurled the crank, (in the right direction) polished it and you could tell it was tighter on the crank. Well, it leaked again.
We are going to try again with a thicker shim because the timing gear failed and we need to disassemble the engine ....AGAIN!
