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I'll check on the rear main seal this weekend. I found that my electric choke on edelbrock isn't hooked up at all. It was zip tied open. Also doesnt have an oil pressure switch at all. The hole in the block by the distributor has a plug in it. I found the one prong and two prong harness that plug into them. Also the blue wire had been cut between the oil pres. switch and the choke. The plug for the choke had been piggy backed into a red wire from the distributor but still wasn't plugged into anything.