Harness
 

Is the harness the same on 67-72 i think my gauges was changed because the bezel on it doesnt have a choke hole but if i take bezel off theres a hole in dash for it. Will this affect lights and stuff working do i need to change the harness ?

There is always the hole in the steel part of the dash on most trucks. Even without the manual choke. It might have a new plastic bezel though. The harnesses were different, but only for trucks with full gauges and trucks without full gauges (idiot lights). If you have a low option truck and you now have idiot lights, then you are probably running the correct harness. Look in your glovebox and see if it is listed on the option list.

Every dash I've ever seen has the holes.