Yes you change just the master cylinder. I would suggest you buy a new one vice a rebuilt one. Just make sure you check the length of the boost push rod first before you put the new master cylinder on. Also bench bleed the master cylinder before you install it.
yeps, and y'all need the booster for yer production year too, the '78 is different from the '79 somehow... 'em pirates got a good write-up on it all, with more information most folks ever wanna have about their brakes, lol
I need a concrete ansewer if i can just do the master cylinder? I need to know before i go buy one. I dont have the extra cash to get a booster right now and with the dual piston calipers up front i need the extra line pressure.