7mgte swap

i want to do a 7mgte conversion on my 85 toyota supra 5mge i have a complete 87 mk3 im using as a donor car i just am going to need help with the ecu. will my 87 engine harness mate up with the stock in car wir harness on tha mk2? or what will i need to do? please help me someone

Hey Guys, I am new in the world of supra and i need a little help figuring this out.I swapped out a 7mge for a 7gte and coupled it up with a r154 tranny but i am not sure if the drive shaft from the w58 will work with the r154.Knowledge will be appreciated.