im looking at changing my suspension from the shocks/leafsprings, to a coil over system on the rear of my 69 camaro, has anyone ever done this, and how well does it work?

I have a coil over- ladder bar set up on my 69 camaro, but I'm also using a narrowed rear. I'm using 130lbs. springs and 3 way adjustable shocks made by Carrera. I bought the kit form S&W racecars.
Bruce

Same here. 130# springs with ALden shocks. I got my setup through Chassis Engineering. I also installed Aerospace Disc brakes front and rear.
There are kits to use coil-over/ladderbar without tubing/narrow rear but you still need to install a cage for frame stiffening and frame connectors would be advised..