The ends on all the 4-speeds are the same, whether the 84 4-cylinder or the 85 and 86 V6's. There is a slight difference in the lengths, with the 84's being a little shorter. The Isuzu 5-speeds transmission ends are only to themselves as are the Getrags. The aluminum pieces at the shifter are the same throughout.
If they can be swapped out, It would probably require specialized equipment. Rodney makes the cables along the lines of OEM. Maybe drop him an email to find out for sure, but I think they're crimped on at the ends.