What changes, if any, have to be made to the heads to run roller rockers. Do you have to longer push rods, or a stud girdle thing. Cant find anything on the search. Can someone please fill me in?

 

nothing, if all you do is swap rockers

 

I for got to put that i want to go from 1.5 to 1.6 rockers, is there anything extra i would need to do for that?

 

.......You may have to drill the guide slots if you are running non-self aligning rockers if you go to 1.6 rockers. Not werth the work in my opinion.........Zapr.

 

Is there a reason you want to go to the 1.6 rockers?
I went with the pro magum roller 1.52 rockers and did not have to do anything to the slots. summit sells them. If your not doing anything else to the valve train why go to the 1.6 just a question.

 

Depending on which cam is being used, the change to roller rockers (assuming from factory) is many. I am going to assume, at least for the original poster, that the change is going to be made from the factory rubber rockers.

Factory rockers are weak. Thery are stamped. They flex under stress, which makes them inconsistant. By switching to a solid-bodied rocker, such as that from Comp (even the Magnums are a 8340, I think, chromo steel) gains rigity and consistancy. That alone can be worth it to some, it was for me.

Aside from that, especially with the peanut cams, increasing the rocker ratio gives more lift. Looking at the peanut cam specs, anything more than that is better.

And without getting technical (I'm tired), increasing the rocker ratio increases the .050" duration, sort of, without changing the duration that is ground into the cam (you can search under my name or various others to get the specifics on this). The slower the ramp rates (such as on the peanut cam) the more the difference larger rocker ratio will bring.

The main issue behind grinding out the pushrod guide slot is not becuase of self aligning or not. It is because that when you increase the rocker ratio, you bring the pushrod in closer to the rocker stud, which can descrease clearance between the pushrod and the cylinder head.

Depenind on which rocker body and style you need, get Comp Cams, either Magnum or Pro Magnums, roller tip or full roller, respectivly. Depending on if you have self aligning or not, it's about $140 or $190ish for the Magnums and about $270 to about $325 for the Pro Magnums. For a factory engine, Magnum roller tips work fine. I use them, no issues.