Variable hydraulic lifters for 440 engine

With solids, you have to have an adjustable valve train. By varying your lash between minimum and maximum, you actually change your Ica, and it is possible as oldkimmer suggests,to increase the lash quite a bit, and so change the Ica quite a bit.
You can achieve similar results by running anti-pump-up hydraulic lifters with some lash. This is what I'm doing with my 276/286/110 Hughes cam. I started out with .020 preload, when the cam was new. Over time, the preload has changed to lash. The idle improved so I decided to leave it. They have been ticking for well over a decade lol.
My butt-dyno has not noticed any powerloss because the old, hard, BFGs spin to past the speed-limit anywhere in Canada, so if there is a powerloss, I say so what, lol.