Tore into it and I don't see how the long tube headers are going to work. They hit both the power steering pump and box and hang 6" too low. So I'm returning them...

I ordered Langdon's CI split headers instead. Still going with the same plan: Y-pipe them together and back using a single 2.5" pipe into a Flowmaster muffler, over the axle and out like stock.

I'm going to try it without doing the heat plate but if I need to I can do it using thick sheetmetal I have laying around.

Let this be a lesson to anyone else looking: the truck headers don't work on cars.