Hi im new here, i was pointed in this direction from a diff site.. im doing the same swap out of an 83 celica supra into my 1990 toyo...
http://www.4x4wire.com/toyota/tech/supra/
heres a site i found, if you have found anything better then this that would be great... p.s. i have very large wiring diagrams if u would like them, thanks