That was the first mod I did to my 72 sierra when I first got it. Like u
mentioned, u will need a 67-68 chevy or gmc hood, a 67-68 hood latch, and
in order to reuse your stock 69-72 gmc grill, u will have to remove the
upper trim of grill that is attached with rivets, then u will have to find a body
piece that covers tha gap from the hood and the grill,it attaches to the fenders, u will have to find that piece in a wrecking yard or ebay (hard to get) cause those only came with original 67-68 gmc trucks and are not
remanufactured.