[lolife99]

A mild drop with quality shocks will ride great.
I would NOT get rid of your trailing arms.
I’d spend money on a good coil over setup like Ridetech, QA1, or others sell, before I’d put a 4-link under it. No need to reinvent the wheel.
Add good sway bars and be done.
(Plus rebuild all the front suspension)

Also look at Ridetechs street grip kits for C10 trucks.

Stock ride height with new springs will make it sit like a 4x4 blazer.
Just my opinion.