I'm using Crane Gold rollers on my 440 with a 292/.509 Comp cam. The only problem I had was, I used the slightly wrong length pushrods and the cup of the pushrod dug out the rocker around the adjuster on 2 rockers. It ended up looseing the lock nut off the adjuster and I had some running issues.... Got 2 new rockers from Crane, the correct length pushrods (you want about 3-4 threads of the adjuster past the bottom of the rocker), double nutted the adjusters, been perfect since. I think they cost right around $350 from Summit. Hope that helps