What is it, that you made or added to your car, from another car and it worked, outside of the original part. For example: Used the heater box, from a 70 monte carlo for my 68 skylark, same for the front disc brakes set-up, All fits perfect and works great. Front lower air spoiler from a late 90's camaro, a few drill holes and nicely tucks in..
Re: What have you done to your buick that wasn't an original part, or off another car I made my hood using GS cowl and used a 68 GS air cleaner and 70 foams to make my Riv have functional ram air