Did you use a flat tappet specific oil or better yet break in oil?
ZDDP is a component of these types of oils.
With bolt down non adjustable rockers you have to establish appropriate push rod length upon reassembly.
Changes in cam base circle, valve stem tip heights, decking the block or heads all have an effect on final length.
When installing the rocker and tightening it by hand a proper length push rod will require about 3/8 to 3/4 of a turn to SEAT THE ROCKER IN THE rocker pedestal AFTER you've taken out the slack between the rocker and lifter plunger.
This is what preloads the lifter plunger.
Torque down after this does not change preload.
If it takes more than 1 turn to seat the rocker in the slotted pedestal while preloading the lifter plunger the push rod is too long.
Less than 1/4 turn and the PR is too short.
We typically get the push rods a bit long when doing final assembly and then fine tune the preload with hardened steel shim that goes under the sled fulcrums.
Finally. When you replace the cam get a proper dual pattern cam.
OEM is 193 / 206 @ .050"
That isky cam is 202 with no exhaust split and is only appropriate if your focus is peak and throttled torque in an HD towing or hauling application. The lack of exhaust duration will clip the last 1000 rpm of the power band.
Scotty J. "AKA" The "Mad Porter"
"EMC 2006" 3rd place finisher
Ported BBF iron head specialist
& Aluminum heads from all sources.
Custom ground cams
See our products in the Vendor for sale section
Customized crate engines
"Parkland Performance Auto Machine
" Formerly RHP
Parkland Auto Machine
Ok... update. We obviously do not understand the phrase "Not Adjustable" when referring to this 460 FORD motor. When we assembled the motor, we simply installed the rockers and torqued them to 25ft.lbs. Apparently, we were supposed to barely tighten them to 0" lash, and then tighten/torque them to 25 pounds after that, max 1 turn. Is that correct? Do the pivot blocks not bottom out? We ran the motor for 20-30 minutes. Cam and lifters are ruined. Going to require complete disassembly, clean everything, replace bearings (based on amount of metal shavings) and figure out how to build it correctly.
Sure would like a link that shows video of how to properly set these "Non Adjustable" rockers.
See the post from Mad Porter.
Set up adjustable push rod - I adjusted length at zero lash making sure pivots were fully seated. Measured adjustable push rod, added .050 to length and ordered push rods.
Shimmed pedestals as needed for final adjustment to achieve 25ft lbs. of torque at 3/8-3/4 turn when installed.