340 adjustable LOCKING rocker arm kit

The lifters are Engine Pro HT-2011B for a stock 340, don't know why the shims were used and rockers, shims, adjusters came from Mancini. CompCam push rods 7821-16 7.389"x5/16". Also, the first two rockers a flopping around and I noticed, where i'm pointing, there is a small gap allowing those two rockers to slide left to right.

View attachment 1715954582

View attachment 1715954583

View attachment 1715954584

View attachment 1715954585
The very FIRST thing you should be doing is asking your engine "builder"