I agree, not much thread engagement. You are only getting to the shoulder.

Now don't forget pushrod length also contributes to where the rocker will sit on the stud. Did you check geometry or is this all *stock*

You can go to ARP's site and get the length or i can measure a set tomorrow for you.

I just found a pic of where the adjuster should be.

http://gallery.bigtimeauto.com/album...ters.sized.jpg

From your pic, mine are way too low in the nut. These pushrods are Magnums as well....just a hair over 8 1/4" in length. Studs are stock, guide plates are COMP. Stock BBC heads.

ARP site says 3/8" should be 1.895 with roller rockers vs 1.750 stock length.

I can measure the arps in the morning for you. Im out of here now.

So I picked up the new 1/4" longer ARP studs and ARP keepers today. I still think there may be an issue. The nut takes 5 1/4 full turns before it bottoms out on the rocker. The allen screw takes 8 full turns before it bottoms out. Is this still too deep? They are not even close to Bigtime's pic above. I had the pushrod length checked and they are the correct intake and exhausts.
http://i20.photobucket.com/albums/b2...r/100_4855.jpg
http://i20.photobucket.com/albums/b2...r/100_4856.jpg

Apparently, the rule of thumb is that the amount of thread engagement should equal the diameter of the stud.

Any updates on the stud / rocker issue? What did you end up doing to resolve it? Were you able to get enough thread engagement to equal the stud diameter?

I installed the longer ARP studs and hardware. 5 1/4 turns is juuuust equal to the stud diameter so I think I will be OK. I ran the car and it sounded good but have not been able to take the car out yet on the road. it did smoke a little from having no intake valve opening while the car was running without the rocker. Hopefully I can put some miles on it and see if it holds together. (fingers crossed)

Good luck!