I just pulled my old hei out and did the new one w/ 50,000 volt coil, billet style for $175 at the GM performance dealer here in Louisville. I've got the old one still and has new GM 4 pin module(has about 2000 miles on it) had new aftermarket coil and worked good except the wires from the coil to the internals of the dizzy were knicked and missing insulation, that's what made mine run good one day and bad the next
anyway I sill have the old one for parts, and you could gut the parts from mine to use in yours and maybe has a spare part or two. How's $50 shipped sound? The GM module itself cost more than that at the dealer. Randy