Mopar Bill, as Detmatt1 has said it would be a good Idea to retain a spot with the color that is on the car now.Now,is the color on the car now the original paint or has the car been repainted along the line? That would make a difference in the shade.The converted formula to base/clear will be very close,close enough for a restoration,remember,you are repainting so originality is already gone.One more thing to consider,the camera,or Prophit,as PPG calls it,is not fool proof,sometimes it will grab a formula somewhere in the system that is close to your color...it might be a Chhhevy...color,or it makes it's own formula.I have had it be right on a color match,but most of the time it has been way off.When you get a formula make sure you keep it in your records and some extra paint mixed for the future.The base color will last along time on the shelf,however,with it being silver with alot aluminum in it,just pull it off the shelf every now and then and shake it real good otherwise it will settle in the bottom and get very hard to mix up