Reply To: coolant in a 12

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Thanks again for all your input, I really need everyones help. The exhaust systen is worth putting in right and seeing if it helps. As far as I can tell from what everone has said the long muffler was between 5 and 5 1/2 feet long and 6 ” in Diam. I will order one today. The next thing to try is to back flush the radiator. When I was rebuilding the engine I cleaned out half a large coffee can of rust from the water passages and then sent the block to the machine shop where they put it in the cleaner (rotating sprayer) for three or four days. At some point I will find the problem. Doug”