Another 1972 dart swinger

So, I start looking into how to correct the preload problem, I've zero preload on a couple lifters and max of .080 preload on one. So, the preload amount is all over the place. Machine shop says measure them all, use whatever length each one needs. I go thru the process of documenting all that using a wire welding tip cleaner that has 20 different wire sizes. Bend each tip at 45 deg so I can get between the retainer and the top of the lifter, measure each one and document it. I think this is absolute BS. Don't like it at all. Project stalls while I figure out what to do. Considering adjustable rocker arms, I don't want to spend a lot of money on this because it's a temporary engine I expect to pull out not too far down the road. I have a 360 and a 340 block sitting here.
The new pushrods will not be used, starting to throw money away here, of which I have very little of.