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All of the parts in the kit appear to be the same as the factory valve on the 340 manifold except for the flapper valve itself, which is a smaller diameter. But I should be able to reuse the original flapper valve after cutting the factory spot welds, cleaning it and welding it into proper position.

Well.....to answer my own question. It seems a number of people on EBay have heat riser repair kits available priced anywhere from 100.00-150.00 dollars. Having a part number in hand, I decided to check with the Dodge dealer thinking the number might still be good. It still is and wholesales for...

I have a right side stock exhaust manifold for a '70 340 engine that has the heat riser valve. Problem is the shaft on the valve has quite a bit of play in it and there is an exhaust leak. Can these valves have the bushing replaced or should they just be removed and a small freeze style plug be...