Those are universal plates, not adjustable plates. There is no adjustment to them. They sit based on where the centerline of the rocker stud ends up. The slider in teh center just allows for installation on any stud girth.

They do have wide rod holes. Not really sue that is a good thing either. Could be enough slop to get the roller tip traveling all over the place.

I would not use them.

What is the deal with the rocker stud installation. Do it yourself? Or done at a shop? Are you sure you checked the water jacket allighment with the heads? It is safe to take the heads off and re-use the head gaskets if the engine has not been started yet.

The water jacket thing can be a real problem if it was not addressed. It maybe the other way around though... a 289 block with 302 heads, but I can't really remember????

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66 Stang 385+ HP 306 .494 /.520 225 durr @.05, 200cc Windsor Sr's, Edle RPM, C4, 3.00 posi, 575 Annular Mighty Demon, 22 MPG,