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For the vacuum leak, take a large rag, make it thick and cover the carb when its running. If there is a leak the motor will speed up. Full strength strength Techron in a 1/2 tank of new gas. Save some Techron, about 4 oz. Run the new treated gas for 30 minutes. Shut it off and add the 4 oz in...

Go to Marsh Performance and see the heads he is doing. You can't run an Eddy head out of the box. The Sidewinder and pro Maxx make good power. Buy them from a reputable shop that does a lot of them. When you calculate the cost of a complete iron rebuild, the import heads, machined here are a...

They flow better than the stock factory head. I don't think that you will notice it. There is a drawback to the head if you try to go larger than a 1.92 valve. There just don't flow well into the combustion. I did this and although the flow #'s looked good the combustion efficiency went down. A...

Dave Reher of Reher & Morrison just wrote an article in the National Dragster on motor oil. For their sportsman engines they recommend 10W30. PennGrade, formerly Kendall, has a a synthetic blend that many engine builders recommend. They also carry a break-in oil. 55 passes and internals look...

I'm in the process of putting together a J/SA '65 Dart. NHRA has listed 3 heads for this year and motor combo. Does anyone have the scoop on what head is the best? Thanks