Thanks guys
The more I look on the web and your posting I am learning alot. I don't think the rocker is rolling back and striking the bottom of the stud. There are no wear marks on the roller rockers.
I found this thread.
http://www.fordmuscle.com/forums/all...plate-fix.html
With not having harden pushrods and a mis aligned pushrod guides caused a bind and snaped the stud.
I found isky adjustable guides at summit. I think the rest of the part list should do it.
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AFR-6104 Isky 5/16" Adjustable Guide Plates ; Qty: 1 set $48.95 $48.95
·This part is temporarily out of stock, but you can order it now. Tentative ship date: 4/16/2009, if your order is placed today.
ARP-134-7101 Rocker Arm Studs, High Performance, 3/8-24 in. Thread, 1.75 in. Effective Stud Length, Chevy, Small Block, Kit $37.95 $37.95
FEL-8548PT-2 Head Gasket, PermaTorqueMLS, 4.100 in. Bore, Ford, 260/289/302/351W, Each $16.69 $16.69
FPP-1262 Gaskets, Intake, Composite, Printoseal, 2.10 in. x 1.28 in. Port, .060 in. Thick, Ford, 260/289/302/351W, Set $21.95 $21.95
FPP-1486 Exhaust Gaskets, Header, Steel Core Laminate, Dual Bolt Pattern Splayed Port, Ford, Small Block, Set $33.69 $33.69
LUN-7078-16 PUSHRODS $115.95 $115.95