Ok back on topic. If you do not see bubbles when you take off the radiator cap most likely your head gasget is ok. Distributor: you asked where to get the mechanical advance springs under the breaker plate. Go to any speed shop or auto parts store and get the Chevy V8 springs, I think Mr. Gasget has them there will be 4-5 different colors of springs all different strenghs. Put in the heavest, put it back together . You do not have to remove the dist from the engine to do this job. Then Re-set the points if used to .019- slight drag. Then reset timing. Adjust the carb, refill with 50/50 antifreeze, 5-7 lb cap and you are done. We think you have a 0 pressure cap now, with a higher pressure cap the boiling point of the liquid that keeps your truck running cool will be higher - thats a good thing. What wt oil are you using?
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