What we got is a 400 Block stroked to 500cui with a fully new Stroker
Kit including Crank from Hughes. Engine was leaking oil at the rear main
bearing after 1000 miles. We installed the Billet Rear Main seal and still leaking...

On Brand X engines we found some rear main reatainers which where using
a double lipped seal. Anybody out there who had same problems and was able to fix it?