I grabbed the f41 bars off the 87 and bolted them up to the 84 and put the tailgate aside. Most importantly the 84 is now under the car port and out of the torrential downpouring of rain we've been having this week. I will now be able to asses the bed leaking, and new windshield leak as of today. Thankfully it is no longer a dire race to keep the floors from rotting out!
I managed to replace the temp sensor and proceeded to change the leaking oil sender but upon realizing that the car originally came with dummy lights and now has actual gauge cluster, I'm going to take another route. The temp sensor doesnt work with the gauge, and obviously neither will the dummy light oil sender even though the harness and plug match up. The fuel gauge works great, and I don't want to risk that by taking apart the cluster and trying to figure out the wiring and dealing with the printed board and moving pins, blah blah blah.
I have a couple of old school triple gauge pods, a new tach, and a gps speedo from amazon I'm going to figure out how to install and incorporate in an aestheticaly decent manner, until I can afford a digital cluster or nice gauge kit.