RAMM Did you happen to tank the block really good before the rebuild. I read a piece by Rick Ehrenburg a few years ago and he stated that some blocks because of poor manufacturing were porous at the rear and were sealed by some coating applied to the block at the factory.He warned about possible oil leaks after a good tank cleaning as it could remove this sealant. In your case it may be seeping just above the crank and presenting itself as a seal leak. I sure feel for you on this one. Ross
