If you are thinking about getting rear e-brake caddy calipers (the big ones) here is some stuff to help you out. If you got your calipers and they are not in too good a shape, and you dont want to spend the 145 on rebuilt ones at the parts store, just rebuild them. I got two rebuild kits for about 6.50 each at advance auto parts. Also if the calipers were in bad shape like mine (mine looke like they were at the bottom of a lake fot the last 25yrs), and the piston is "ate up" meaning rust has gotten underneath the chrome finish, get some small calipers of a 80's (I think 85-90ish) of a seville that have the e-brake on em. The piston and the clutch and arms, everything is interchangable except for the pads, which are 5 and something inches instead of 7 and something, and my pistons off of these were near brand new. So Ive spent around 50 bucks for a new set of eldorado calipers. Didnt know if you all knew I just thought I would spread the word for those looking to save some dough.