OK....my truck will go 60mph in second gear from the speedo.....? dont kwow what it really is....and it gets there in about 10 seconds? I really need to get my wife to check it....badly, I have done over 100......its getting 20 mpg. all with factory/unknow gears? should be 4.10:1 but I got the truck with 215k on it so who knows what PO did to it....the engine is all mine.....I built it.....all it needs is a fan shroud so it wont get quite so hot.....btw, MINE MISSES for some reason as well....dont know why though