[Rick Parker]

Dave: Yes this is more common than you might think. Depending on the rocker arm ratio and cam lift being used it is often possible for this to happen. The engine builder should cycle the engine (rotate two revolutions) and checks each rocker. Checking for pushrod interference and also for the rocker arm and spring retainer contact.
On the Windsor Jr heads I use I found it necessary to use guide
plates made by ISKY that are intended to be welded after the correct spacing of the pushrods is determined. The OEM/Manley pieces did not put the rocker roller tips directly over the valve stems during setup. I found this strange as there was nothing in print refering to anything unusual that would be required.

Just a thought...........Rick