I cant say on the 67-72 trucks but a freind of mine has the
http://www.onepieceproducts.com/Prod...ductid=OPP6772 version in a 74 c10. Its a very nice product the fit and quality seams factory in that truck. I would guess from the 73-87 trucks and the 67-72 the quality should be simular.
I had to call him to ask what kit he used, one thing he did though was tack in some small diamiter pencil rod on the inside of the door near the top to prevent oil can effect. But he did that b4 the kit so he couldnt say if it was nessisary or not. Said he just wanted to be sure cuz once he gutted the old wing window stuff the door seamed to flimsy.