first question is what yr is the shell? if it is a 89+ you will need the harness of the shell and if you can locate a harness for the na of that motor and trans set up u will be in good water, here is a link i have for i am doing a reverse swap my self a 91na with a turbo 88 droped into it full swap of ecu harness trans and a few other little goodies, but since the <88 are different then the 89+ the harness will not plug into the dash hence this link,
http://members.shaw.ca/boltz/7MGTE-S...TE,%205MGE.htm will help look at the pin outs, and the turbo harness on a na, there are many things different, example the na has a diffent afm, also no coil pack's, are you going from a 5speed to an automatic? we need detail's... yrs of everything, and it isnt a conversion but a swap.