Why would it not be possible to run solid lifters and adjust them the way it is done on [censored] cars except different length pushrods instead of different lash cap bucket thingies? It may get expensive to order a bunch of very slightly different length pushrods but it would allow to the lightest possible rocker with no adjuster and a very light lifter... has anyone done anything like this?

My thought would be to order one set how you normally would then measure clearance and order 16 very slightly different ones to fit each individual cylinder. Even ordering 3 or 4 sets like this and playing around with them would be much cheaper than one set of adjustable rockers...

As far as solid lifter are concerned is there any drop in ones available? If not can you just pull the guts out of a stock one and put the cup into the bottom of it somehow?