These are all the parts you need to convert from Vacuum to mechanical linkage. Includes slidebar, J shaped bracket to attach to center carb, slidebar to rear carb, long linkage arm for rear carb, all bolts, and parts needed. Includes new set of torsion springs for end carbs. Specify GTO or Full Sized Pontiac when you add item to cart. There is a difference in the kits. Kit does not include the long rod on passenger side that runs from rear carb to front carb. This is the same part for a vacuum linkage car, so many already have this piece. If needed, it is also in the shopping cart.