some other considerations....
crank sensor on 84-85 is different than 86-87 and expensive if/when you find an OE one. use the 86-87 crank sensor together with the pig-tail adapter from Casper's Electronics in CO. you can buy direct from Casper's.
also from Casper's are the the items needed to convert the coilpak/ignition module to the 86-87 setup. this is an example that Brad hinted at regarding parts availability. 84-85 ign module/coilpak is not really readily available. video below illustrates the conversion to 86-87 setup.
the idle stumble referenced in the video and in the comments section is most likely from the use of the factory chip....something a lot of folks are not familiar with....factory chips have way too much timing for today's formulation of pump gas. Eric (TurboTweak chip programmer) reviews this on his website.
84-85 TPS units are readily available from Tomco for mid $40 range. don't be fooled into spending $300 for a hot air TPS. I review that topic of 86-87 and 84-85 TPS units in thread below. hot air begins in post 10.
Which is preferred? Delco TPS sensors(which version) or Standard Motor Products SMP TH49