350 Tpi swap. Questions

I will be doing a 350 tpi with 5 speed swap into my truck. The powertrain came out of a 88 Trans Am GTA.I currently have a S4 13b in my truck, when i did the Rx7 swap i put the lsd diff from the car in the truck, I was wonderin if the diff would be able to take the abuse from a v8?? Or if i should just swap the rear axle from the trans am into my truck and get my front hubs redrilled to 5 lug.I am also going to be bagging the truck during this time.So i wanted to know if i would get wheel hop or something of that sort with the v8 and bagged combination.

For the wiring harness i plan on using:

Or:

Which would you guys recomend?

Thanks

My TPI motor came from a 91 Firebird. I have gone through three B series rears. One 2600i and two 2200 rears.
I would contribute most, if not all failures, to single tire spin. I would imagine the LSD would do better.
I have had no wheel hop, but I have helper springs helping out with axle wrap.
My plan is to eventually swap the S10(10 bolt) LSD rear I have sitting on my garage floor.

Go irs. That will help a lot...

What did you do for a wiring harness on your truck?
I could put the rx7 irs in it since i pulled it before scrapin the car

I started with a complete GM harness from a 91 Firebird. I didn't have to chop it up, but did need to figure power needs.
If I remember correctly, I needed two fused circuits for the injectors(10 amp for each bank), a switched circuit(ign.), and a few grounds.