Sometimes it proves to be a better proposition to buy a whole donor car. Preferably a rust out or a rollover. This way you get ALL the matching bits, like loom & computer, along with filters, fuel tank pump etc, etc. You may be able to sell some parts to get some cash back, then when you're finished, ring the scrappie & tell 'em to haul it away.
Check the trading post for a couple of weeks, it might just save you some grief, & some cash. It's worth a look.