Hello All! It seems that grill and brush guards, bull bars and front end hitch receivers are not made for my 1978 Cheyenne PU... BUT, I'm reading that the GM bodies/chassies? are the same from 1973-1987. I'm finding winch mounting systems for 1983 and 1984.... Will these years of Silverado, or K10 mounting systems fit my 1978??? THANK YOU!!