I know this thread is a bit old, but I'm about halfway through using the American Autowire Power Plus 20 kit. Power windows and locks are up to you, but I re-used my OEM harness for that and piped it into the extra feeds they give you for that. Came with a new ignition switch connector, I had to swap the pins into the OEM turn signal connector, using a floor mounted high beam switch. Otherwise, all the stock stuff fits. I haven't run the back half yet, but the front half is good to go.
The fuse block is even the GM style. Bolts right in if you use the interior half of the bulkhead connector as a spacer.