Baer makes a good kit, they come with the spindles, it is just bolt on. The only install problem I had was the bracket connection for the new braided flex line that came with the kit.
There are a few other kits out there including the 1LE conversion kits. You will probably be looking at at least $1000 for a front kit.
I am pretty sure there are kits out there too that you can switch out your drums in the back for some disks.
Check out my fquick link for photos of the Baer Sport kit. The calipers and pads are basically C4 Vette parts, and the disks are seperate from the bearings which in my opinion are easier to deal with.
http://www.fquick.com/zride91