340 adjustable LOCKING rocker arm kit

Jadaharabi said
The Chrysler rocker arm on the 273 and the 70 340, 6 pack do not have a lock nut they have a varying thread that causes the tension between the adjuster and the rocker arm that holds the adjuster in place when you adjust it. Now the thing that you do is you tap those rocker arms out to straighten those threads out and you put in the ones that use the nuts to lock them down. But you also want to take a flat file and dress the top of that area on the rocker arm where that nut sits otherwise it's going to back itself off. Here is the kit from jegs.

OEM 340 6-pak engines did have the machined pad and jam/lock-nut on the adjuster.

Got a few questions:

* Does the OP have hydraulic lifters? (273 pushrods are normally about .25"-.30" too long for hydraulic lifters.)
* Were the rockers shimmed because the pushrods were too long?
* Mis-adjustment and/or rocker-to-retainer interference could have contributed to the bent pushrod as well.

FWIW, I don't have any to compare side-by-side, but I believe some aluminum rocker manufacturers, like Harland Sharp, use the bigger adjusters.