[byrnech]

I had a similar thing happen to me, it's the roller rockers. Each company uses a little different setup as to where the ball cup is placed. On my 331 I use a 6.4" pushrod with a Scorpion roller rocker. The only way is to use an adjustable pushrod to get the correct length. But it should be around that size. Stock is like 6.27" or something. Hope that helps a little.