well i tried putting them on the stock pedistols and they wouldent fit. when i put the stock rockers back on then went snug with the pushrods and the springs, it actually pushed the springs down some. when i tightened down the 1.8's with there pedistol, they were just resting on the springs and not touching the pushrods at all. some had a little less play than others because i considered maybe the motor just has to be turned over, but it was to much play for me to chance.