quick questions 6.0 swap into 95 gmc 1ton 4x4

[cyamaha2007]

First off i wanted to say this is a great site. I was sent over from ls1 tech. I have a 95 sierra sclb 3500 4x4 i want to swap in the drive line from a wrecked 99 2500 4x4 silverado. Both trucks are autos and manual shift t-cases. Ive done alot of research but it seems everyone is keeping the original trans and t-case in 95 and later trucks. So im confused how to wire my speedo to the gauge and for cruise. Also how should i tackle the 4x4 wiring??? One last thing, i would like to use the 6.0 alternator is there a problem with this? It seems common practice to use the obs alternator is there a reason for this other than cost? I want to use as much from the ls truck as i can. I need a reliable work truck that uses of the shelf parts in case i have a break down away from home. I just wanted to say thanks alot again.

[cyamaha2007]

If anyone could help me with a topic or thread to search threw that would be great thanks.

[Ray@NP]

your speed will work all you need to do is run the speed signal at tac signal with yo your cluster im not sure of the exact pins but i will get you that info. And yes you can use the 6.0 alternator, we do these conversions all the time

[cyamaha2007]

Thank you very much ray.
Chuck