i have a 440 and this is the first time i have installed a roller cam.i have a comp cams cam,timing chain set,button.the problem i have is i installed the cam button in the cam gear(the black bushing first) then the nylon button.once the button is in i can't get a hex bolt or a allen head bolt in the cam gear. its almost as if the button is too big in diameter.anyone else run into this?any advice is greatly appreciated.