Rocker Arm OEM?

[gjames]

I am rebuilding a 76 2.7 motor. 3 of the rocker arms have pitting. I have another set but they don't have the markers in the castings. In the attached picture the bottom/right set have marking cast in the arms and the ones at the top/left don't. Can I use the set without the markings? Were there multiple OEM providers of rocker arms?

[Flat6pac]

Yes, there are several different suppliers of rockers over the years..
Bruce

[r lane]

You may want to have them reconditioned as the bushings can have wear as well as the foot. Elgin Cams does a nice job. Bob

[Henry Schmidt]

We do a pretty nice job of reconditioning rocker as well.

Rocker process:

We remove the old bushing and adjuster (if present)
Clean adjuster threads with 8x1.0 forming tap.
Ream the bushing hole
Black Oxide the rocker
Press in the new DP-4 bushing and burnish
Surface the contact pad
Coat the contact pad with Moly dry film (TLML 2)
Treat the rocker to a Cryogenic conversion process

[jjeffries]

Henry, those look good enough to eat. John

[gjames]

Thanks for the input.