Is it possible to lower a 3/4 ton?

[WB72]

I would love to lower my 72 C20 3-5 or 4-6 ( I don't want to C Notch)if it is possible, I can get lowered springs custom made from a supplier that I use @ work, but they had a few questions about the geometry.

Front, Is there someone who makes a lowered spindle that will fit on a 3/4 ton? (it will not be hauling any weight so if a 1/2 ton will fit, what drop should be applied by the springs).

Rear, How much drop should be done by springs and how much by blocks.

If anyone has done this, to any extent, please let me know where parts came from and how they worked.