first time on the sit hope i can get pointed in the right way

this one form what i can tell is a hard one but heres what i am trying to do

i am trying to install a 8.1l/??? allison 2100mh 6 speed??? in a RV GVWR 25000

i all ready have a 8.1 but it was LP so i get to make it back to gas i know how to do that and have worked with a 8.1 befor but i do not know much about the allison TCM / 1000 or 2000

i really need help bad on making a wiring harness for them as i cant find much info or part numbers
it has to be a setup like out of a GMC Kodiak Chevy Topkick C4500 C5500 with out the park pal no AC just a drop in and run

i see light trucks and RVs with this setup all the time but to find the setup i need in a HD truck or RV is hard and when you doo they want gold for it ..

i have not got tin the allison and can work with the 5 speed if i have to
have fond a good allison thread for info but really need some one to go
ECM part number TCM number the well talk to the ECM that kind of help

the fly by wire ECM/PCM/12200411 what ever it was and wiring that came with the 8.1L is setup for LP so i do have some parts to work with form there
the 8.1 did come out of a GMC Kodiak Chevy Topkick C4500 C5500 that was LP but no TCM no 2 turbine censers so i think it had a manual trans

cost whys i am just trying to make a bench harness inless some one know what i need and where it is at low cost as working off SSI sucks

thanks to all and every ones time.... i hope comes my way

now the long story part for ppl that would ask why
bla bla sick wife wants to see the usa bla bla lost every thing gave up the rest for this RV was a DP had a fire inside now the wow part its up and runing with a GM 350 .TH400 just to get it around drives like a 1ton this is my home and trying hard to get it up to speed the 350 and trans i do not want to push so i know and is why i am hard trying to make this work