End of last year I went with a Performance Online (via eBay) kit for my 3600. Came with adapters for the different 3/4 ton spindle options. Very happy with how that turned out. Took something like 2 hours to do the whole swap (and some extra time to install an adjustable bias valve). Keeping in mind I already had all the hardware free so I wasn't fightin frozen or broken bolts.
Nothing wrong with drums, they really stop fine, I've had plenty of 4 wheel drum vehicles (and still have a couple). Our firetrucks still run drum brakes, so I mean... they work. For me, it was more of an experiment and of course I saved all my old parts. I just wanted to try it, and I am very happy with the setup.
This kit does kick the front tires out about 1/2" (IIRC)
