I have 53 GMC with an original 302 six that I rebuilt and the old rope seal was too loose and leaks right out of the gates, (in other words, as soon as I started running it) This is my main truck and I have been running it for a few years spewing oil all over the place. Any ideas for fixing it? Are there any new different types of seals that would replace the old rope style and would make pulling the engine again worth it?