If it's a stock cam (or mild cam) 10 -15" is pretty darn low. A mild cam should give you 15-17". I wouldn't worry about those details just yet though. See what the compression test shows.thanks dave, unfortunately i have no idea what cam is in it. i did not do any work to inner workings of engine, just replaced parts external parts so it would look good. ( i'm more of paint and body guy, not a gearhead at all). how do i go about doing compression test?