I have a 1968 Chevelle Nomad with the original 327. The car and motor have 80k miles, however it has not ran in nearly 10 years. My great Grandfather bought the car originally, and it has just recently come into my possession. On with the problem. This past weekend I got the car back running, but an odd thing happend. Within 10 seconds of running the oil filter seal blew out and it dumped nearly all the oil before I could shut it down. Thinking I had somehow picked up the wrong oil filter, I got another one, verified it was correct, and installed it with more oil. Same thing, it blew out the oil filter seal. We're talking about a geyser, not a trickle and it's instant. From there I removed the filter and "hub" it screws onto. I cleaned up the hub, checked for obvious problems and reinstalled it with the filter and new oil. Again, it blew it out. I fear I have a blockage in an oil gallery just beyound the filter. Does this sound plausable to you fella's? Can anyone think of anything else that would cause this problem? If it is a blockage, is there anyway to clear it short of a rebuild? Thanks for your help.