I have a 350 w/383 stroker kit with .515 intake lift and .525 exhaust lift and stock vortec heads. I just bought some roller rockers but although I asked for the 1.6 ration I recieved the 1.65 ratio. I keep adjusting the rockers and can't seem to get all the lash out or when I do, the noise returns very quickly. I have poly locks and set them everytime.

There seems to be an unusually small difference between getting the lash out and the valves not seating. I am wondering if I need to change the pushrods to a shorter length due to the change in rocker geometry?