I got my white 89 back on the road yesterday.. Driving it around trying to adjust the Detent /TV cable.. I caught alot of exhaust fumes.. I'm running w/o tailgate and softop. Now.. I was noticing.. on the rear supports where the tailgate(original) mounted, there are a few holes down bottom. 1. Are these for a pickup tailgate trunnion? do they bolt right up? 2. And how does the pickup tailgate latch to a K5? assuming this all works. I need a tailgate to make my softop mount better to the rear rather than let it flap around.. And I don't want to inhale anymore exhaust fumes.. THANKS in advance.