I Need Engine Experts! 340 Roller Lifter and Pushrod Issue

[HawkRod]

With that style of rocker, I try to have the adjuster screw set up as follows:
Thread the adjuster all the way up into the rocker as far as it will go.
Go back down one turn……snug lock nut.
Adjust checking pushrod to just fit between lifter and rocker…….then add the desired lifter preload to that length.

That will give you an adjustment range of +/- one turn and still keep the oil holes in the correct position.

That's pretty close to what I've got.
There just aren't that many short push rod choices out there either.