I am currently looking at a 1987 gmc fullsize truck. It has a 305 with tbi on it. I owned a 90 gmc sierra before, so i am somewhat new to the 73-87 bodystyle. What all is required to get rid of the tbi unit and put a carb in its place? If i get the truck, my plans will be to swap out the 305 for a 350 later on and i would like to run a carb instead of the crappy tbi.