Trying to sqeeze more out of my 340

go with a good 904 with low first gear if you like your motor set up, you are pretty well gauranted to pick up et 1 to 2 tenths, make a ram air kit for your carb if you have the factory scoop and hole cut in hood , take a old factory air cleaner lid , turn upside down, cut center out to match carb , jegs or summit sells some foam that a couple inches thick and the same wide, glue around outside of the lid, make a bracket to hold it on good, may have to trim for hood to shut good, go try it at track, it was the cheapest hp and et ever got around a tenth, good luck:D