RRC 87 Manual into 88 Auto

[treemagnet]

Hi Everyone,

I have a 87 RRC 3.5 EFI V8 with a LT77S spd strapped to it. Not without its engine problems but i think the swap will fix them. Unfortunately she has rot in the chassis and some floor plan, hence the swap to one that is structurally very clean.

I am swapping the engine and gearbox into a 88 RRC that had a 3.9(instead of its original 3.5) running on the 3.5 EFI system and a 4sp Auto box.

My engine (in the 87) runs like crap at the moment, but i think thats due to thin oil, and aged ignition and wiring, plus probably needs a tune; the process of swapping and checking should solve it. The engine itself was rebuilt 6months ago.
I don't know the history of the 3.9 and it wasn't fabulous.

I plan on using all the wiring out of the 88 as it seems to be in better condition and what surprised me the most, when i got it everything, all wipers, lights, everything worked.

My Questions with the change over are:
- can i just use the 88's wiring as long as i properly fix the auto Neutral cut out? or has the wiring got more differences than that?
- Is there any hidden tricks i should worry about for the clutch swap or is it the bolt out bolt in swap it looks to be?
- And finally are the brakes for the 88 auto better than the 87 manual? can i use them if i just swap over my smaller pedal from the manual?

Any ideas or help would be great

Cheers
Sam

[Loanrangie]

The wiring loom for the engine will just unplug at the firewall so you can swap that easily, the brakes are identical so no advantage there .

[treemagnet]

awesome, thanks for that, hopefully it will go together fine then