Could use some help identifying some roller rockers

Awhile back I was able to pick up a pair of EQ CH318A heads that I believe to be the "good" ones.



I knew they were a set of the earlier ones from seeing them on the car, but bought them unseen other than that. So when they showed up with a set of roller rockers and ARP head bolts, I was pretty pleased. I did notice that one of the poly-locks was missing, but figured maybe it was in the the bucket of head bolts, and was glad that the rocker itself wasn't missing too. I didn't have any plans for them, so I just stuffed them in a corner and went on with things.

I don't have any plans for them now, but figured I should make sure I have a complete set of everything in case something comes up. And I got curious about the rockers.

Here is one of the rockers. Other than the 1.6 etched on the pushrod side, nothing else I can find.



Looks very close to the Hughes Stainless ones, but their note says:



Plus, the kit seems to include pushrod guides, but the studs look to be press in??





Yikes! Just noticed that valve has dropped, probably why the rocker was removed. Guess I will have to investigate that more.

Maybe this is a earlier Hughes kit or something? Anyone recognize them?

And the ARP head bolts are missing one of the longer bolts and three washers. At least those can be bought singly, I think?

Also got the MP valve covers later on. They thought they were cracking, but I think it is casting flash. And they have been welded on the corners and to remove one of the holes.





Anyone know if those are supposed to have baffles?

I swear I did some research on this before asking. Well, on the rockers anyways. The rocker studs were a revelation to me so I didn't look into them before asking here.

I am pretty well convinced the rockers are just generic SBC rockers. Found plenty that look similar from places like Jegs, but they had different markings. Either way, I think they are just a standard roller rocker.

The rocker studs appear to be a match for the Crane conversion kit:



Crane Cams 36655-16 Crane Rocker Arm Guideplate Conversion Kits | Summit Racing

The valve appears to not have dropped and instead is missing a lash cap or something similar. There are 4 missing on that head, no idea why. Just one more thing to add to the list of parts.

Oh, and the valve covers appear to have been pretty heavily reworked. Best I can tell, someone machined or ground off the ribs, I just thought there was an option for ones without the ribs. The welded up hole was due to how the casting would have had an opening after removing the ribs and boss there. And the corners were welded and machined to add material so the gasket would seal. All in all, a whole bunch of work.

There seems to be a lot of misinformation about running the Chevy 1.6 on the Magnum heads. I experimented with this once, geometry was horrible. Lost quite a bit of lift. Well aware of loss with lifter angle, also messed around a lot with push rod length. This is why Hughes sells the 1.65, compensation for the loss of lift. They are indeed the New Zealand casting, awesome score!

408 swinger said:

There seems to be a lot of misinformation about running the Chevy 1.6 on the Magnum heads. I experimented with this once, geometry was horrible. Lost quite a bit of lift. Well aware of loss with lifter angle, also messed around a lot with push rod length. This is why Hughes sells the 1.65, compensation for the loss of lift.

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So I should probably just pull them off the heads and sell them to a Chevy guy instead of running them.

DionR said:

So I should probably just pull them off the heads and sell them to a Chevy guy instead of running them.

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That's what I did, lol.