another 4l80e swap

I have a 96 tahoe 4wd and the 60 looks to be shot.
I've been going back and forth on whether to get a rebuilt or do the conversion. Long story short, I picked up a 98 4l80e that was rebuilt about 10k ago. Marking on the tranny said it was rebuilt about 9 months ago and upgrades performed.The guy also threw in the tc, tc cover, transfer case, rear driveshaft and flywheel for $700 out the door. It does look like the transfer case is an np246 tho.

Right now, I'm trying to make sure I have everything I need and could use a sanity check so I have everything on hand when I start.

Got the trans, check.

input shaft. It looks like the 246 would be a PITA to wire up so I'd like to keep the 243 that's in there now instead. It looks like the 32 spline input shaft is the same part # for both the 246 and 243 so theoritacally, I should be able to swap the two. does this sound right?

transfer case adaptor. I'm guessing I can reuse the one that came with the 246, they look to be identical.

TC cover, I have the one that came from the 454 and should be good there. I need to confirm the bolt holes are in the same place as on the 60e.

wiring. I think I'm going to rewire the 60e harness and add the second VSS connector. I read a few places that the conversion adaptor was needed to allow the harness to reach since the 80 connector is on the opposite side. Is this a problem?

flywheel. Do I need to switch flywheels or can I use what is there now although I would only use 3 bolts? I didn't get the spacer from the 454 flywheel so if I do switch, I'm assuming I need to buy the spacer?

Tune. I got a quote from pcmforless for $175 for a retune. I'm not sure if there's anyplace local to SF Bay Area that can do it or a less expensive method, but I'm all ears.

tranny lines. I'll porbably pick up the sonnax kit.


driveshafts. I haven't measured the DS I picked up. the The donor was a 98 tahoe 2500 4 door so it should be close. I would have to replace the ujoint on the rear.
Front DS, am I better off scouring the junkyards or getting my existing lengthened?

What else am I missing?

Wish I could help but once I see 4wd im lost :lol:

lol, I know what you mean. I had a 4wd blazer that was a pita to swap engines. I'm hoping this will b easier ;)

To be honest, I'm most worried about the transfer case