g-machine shortbed-who makes a good suspension?

[HOOPTY67]

I've got a '67 SWB Chevy and want to make it corner like its on rails. I'm looking for approximately 4/6-inches of drop, a good disc brake front end conversion, front and rear sway bars etc. I've got the drivetrain sorted out but need opinions on the suspension. I'd prefer adjustable coilovers if at all possible. thanks in advance.
The plan is to put 20's with a decent amount of tire and 600 hp under the hood and i'd like the suspension to keep up...