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...

[ratrod67]

http://www.earlyclassic.com/

[uncle]

Early Classic.

[ozzyracing]

Early Classic all the way!

[speedracer]

I bought my front spring and spindles from early classic but they are not the best for rail handling. Great for conversions and kit type stuff. You wanna look into classic performance products AKA cpp they have bigger sway bars, rear coilovers, and my personal favorite quick ratio steering box. My truck handles as good as a new vette and I autocrossed it for proof. The wide stance of the truck with the right suspension is unbeatable!