I have got a 54 buick special i would like to up gread the brakes is ther something i put on ther off a nother car like a newer buick from the 60's i don't have a lot of money but i am changeing the wheels so i also would like smailler drums i don't know much about buick and what iter changes i what years or if some you knows of a cheep disc brake converson i know the spelling sucks that is not way i'm on hear so need to tell me only if you can help thanks james
I haven't tried one of these disc brake kits, but have heard good things about them. http://www.scarebird.com The kits are basically brackets to convert to front disc brakes and come with a parts list for you to take to your local Napa or other parts store and pick up the discs, calipers, etc.
http://www.crankshaftcoalition.com/...Pontiac_suspension_upgrade#Disc_brake_upgrade Long read but may be what you want.
Smaller drums? You don't want less braking ability on the car. Buicks use lug bolts so you're pretty limited with wheel choice.