Has anyone tried the Best Kevlar rope seal? I can't seem to get a regular seal to stay in my engine.  I have been in the process of having this engine built for about the last three years, and to be quite honest, I am getting tired of it. It is a 292 bored 80 over with a 312 crank machined to fit.  The first time it was put together the head bolts were improperly installed and it filled with water.  Got that problem resolved and now I can't keep the rear main seal form leaking. Recently put in the second one and shortly thereafter it started leaking.  Any suggestions would be appreciated.

Jan  Urbanczyk  Major USMC Ret.

                                                                 Bowie Maryland