[Zeder]

I have see a few posts that say you can run a full roller rocker on stock heads without guide plates, but I just wanted to confirm.
I have 462 heads, they have the flat sided pushrod holes. Are these what they call factory guide plates. I'm an old Ford guy, just learning about the Chev thing! I have never seen this before. I would like to put 1.6 ratio rockers, non self aligning, on a mild RV cam, 0.472/0.480 lift(with 1.5 ratio). Will I run into any problems with pushrod clearance or guide issues? I already have the rockers so I would like to use them if I can. Any comments would be greatly appreciated

[johnsongrass1]

Yes, the slots are what the factory uses in place of giude plates. However they hold the pushrod a little to low to be used at extreme RPM. Since they aren't intended for preventing deflection like the aftermarket plates they still can be used with the cam specs you are considering with confidence.\

Happy rolling!!

[Zeder]

Thanks a lot! I am not intending to buzz this motor above 5000 so really high RPM,s should not be an issue.

[engineczar]

Just make sure when you set them up to spin the motor through 2 complete cycles and observe the clearance between the pushrod slot and the pushrod in the long direction. Often with 1.6 rockers the pushrod will bind on the ends of the slots in these early heads. Maybe before spending the cash for the 1.6's you could borrow a 1.6 rocker from a friend (or enemy) to check to see if you have enough clearance.