I am changing valve locks on my Edelbrock RPM Performer Heads #6092 for a big block Chrysler. I bought them 15 years ago. The fact sheet I got with the heads as well as the Edelbrock website lists replacement valve locks as #9616. So I bought them in good faith but they won´t fit. They are not as beefy as the originals. They are 0.10“ shorter and 0.10“ less across from top. The current beefy ones also have a cup shaped top probably to retain more oil around the top of the stem. The originals as well as the ones I bought in good faith are both single groove for 11/32“ stem size.

Can anyone tell me the part number of those beefy ones I have? Comparison photo enclosed.

Thanks for replying

Ragnar in Iceland