Rocker arms

[NFSINSANE]

Im new here but I've searched around and haven't really found a clear answer in the forums. I was just wondering if there are any other rocker arms aside from the crane cams set that will fit the gen 3 60v6's, there must be some way to modify a pair of some brand that has roller tips. STAMPED IS DUMB

[geoffinbc]

You can buy any of the popular narrow body roller rockers with a 3/8" stud hole and use ARP or Crane 10mm to 3/8" conversion studs. I Tried a set of COMP CAMS Pro Magnum Rollers on my latest iron head build but the trunions are a little too wide. Check the trunion width before you buy. Aftermarket rocker with 1.260" wide trunions like the Crane rockers will work on iron heads. It seems aluminum heads afford a little more room between the trunion locations.

[AaronGTR]

I have used the cranes, and I now have a set of scorpion SBC narrow body rockers on my engine. They are all aluminum with roller fulcrum and tip. Using either one is not a simple affair though. Besides the conversion studs, they also require using guide plates and custom length heat treated pushrods, as well as modification to the nose of the rockers and the bottom of several runners on the lower intake manifold. They hit the bottom of the intake in stock form so you must add clearance. They are more difficult to install as well. Unlike the stock rockers where the pedestal sets the height and keeps them straight, with these floating rockers you must go through and turn the engine by hand and set the height and pre-load on every rocker. Using these rockers takes a lot more time and is a lot more complicated.

They may be a little lighter and more accurate ratio than stamped steel rockers, but you are also adding more friction and side to side motion than stock rockers by going to the guide plates. I think that would offset any gain from roller tips. And thats all for a stock 1.6:1 ratio rocker. If you could get a 1.7 or higher it would probably be more worthwhile, but right now you can't so I wouldn't bother. They are actually working with scorpion right now to make some rockers specifically for our engine and in different ratios, so if I was you I'd wait for those to be released. It would be a much better option!