Small Block Rocker Arm Alignment

[Joe L.]

Re: One More Thing

Scott-----

All of the GM screw-in style rocker studs are the hex type. GM never used the non-hex type stud in either PRODUCTION or SERVICE. Basically, the hex type are better for most purposes. However, the non-hex type are better from the perspective of maintaining original configuration and eliminating the need to machine down the rocker stud bosses (not the "valve guide tower" that you referred to; the valve guides need to be machined only for the retrofit of certain types of positive valve stem seals). You will need to obtain the non-hex type in the aftermarket. I think that Pioneer Engine Products makes this type of stud. The big performance fastner manufacturers like ARP do not.

Using the screw in studs, whether you use the hex or non-hex, is FAR better than maintaining the pressed in studs if for no other reason that the simplification of field repair.

[Scott G.]

Re: One More Thing

You are of course correct, the proper term is rocker stud boss. My brain is not always connected to my fingers!

I will try to find a pioneer retailer to purchase the non hex studs. I have used Pioneer parts in the past and have a high regard for their quality.