[78 GHOST]

I hope you don't mind yet another opinion..

When I began reading the first post in the thread, there were a couple of things that grabbed my attention. All of the following can be checked without turning a single screw (except the flex fan.)

First, as previously mentioned the flex fan can be a problem.

Second, as Mike Nixon recommended be sure the mechanical advance is operable. They get funked up and frequently malfunction, causing problems with heat. Use a timing light and a check of advance up to 3,000 RPMs, it should all be in by then.

Third, examine the lower radiator hose while checking the mechanical advance (when you have the RPMs up) and verify it's not being collapsed by water pump suction. Older hoses had a wire inside to prevent this. Newer hoses allegedly don't need this wire because the rubber is of a better compound.. I say allegedly.

Fourth, verify you aren't suffering any vacuum leaks.

I hope I don't bore you by reinforcing the message others have initiated.. these are things that have bitten me in the past.

Best of luck, -Matt

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Much love out to my Peeps