Found my answer through a Nissan parts guy. The R32 GT-R used the following ECU's, identified by part number.
"The R32 with a RB26DETT engine appears to use a 23710-05U60 from 8/91 to 4/92, 23710-05U61 from 4/92 to 2/93 and 23710-05U62 from 2/93 on."
Hope that helps somebody else. Watch out for some of these engine importers, I just had a guy try and give me something else stating that it was the correct ECU, turned out to be for a completely different engine (VG33).