700r4 swap questions.

[Awann99]

I recently picked up a used 87 700r4 to swap in place of the th350 in my 1969 1500. I wanted to get a little better gas milage and help quiet the engine down on my commute. I have a 3:08 rear end in the truck currently and I will be swapping that to a spare 3:73 5 lug 72 read end I have so the 700r4 will drive better. I’ve already swapped to disk brakes using 72 stuff so I will just have to swap the rotors from 6 to 5 on the front. I’m not sure how to set up the lock up harness on the trans. The guy I bought to from had just cut it at the base. Any suggestions to a kit to use and how to hook it up? I also wasn’t sure which torque converter I should go with. The trans came with one but I’m not sure how to identify it. I’m running a 235r75r15 and will have a 3:73 rear end. I know I will need to get the drive shaft shortened as well.
Thanks guys.