hello fellow 68 owner ...
this is just my opinion ...
IF it were mine .....and that original ... new tires ... new brakes ... and AAA is the way
it sounds like a time capsule ... so .... what is the brake issue ? mushy pedal ? low fluid in rear reservoir ? its ALWAYS time for a brake inspection after every set of tires
and even when you first get a vehicle just for a piece of mind and safety
leave it stock ... have your original master cylinder rebuilt by https://whitepost.com/#hometop
if it still has bleeder valves and its the original ... love to see that at shows
also send them your wheel cylinders if they are still delco morraine originals ..
the power booster is probably alll right if you dont see alot of brake fluid in the cup there....
we had a booster rebuilt a few years back and we requested NOT to refinish the out side so it looked old n original
turned out pretty good not bright n flashy under t he hood of a 69 40,000 mile camaro
turn the drums ,,, your not going to be driving it hard Im sure... power drums in proper working shape
stop great.... good decent medium shoes ... keeping all the hardware together for each corner and not mixing up
the adjusters from side to side like the car in my shop now with a stuck brake issue left front
soak the fittings lightly with pb blaster always having a towel around for splashing and drips ..
using a quality tubing wrench as not to round any corners..
all 3 new brake hoses for sure also ... but I still have originals on a couple of my cars with no issues...
but my 88 GMC motorhome w 33,000 original just jacked a caliper hose last summer at the gas station
right b4 taking off for week camping/fishing trip ....so go figure
gotta have good brakes ,,, b4 anything else ..
keep it stock .... oh post up some pics tooo we like original cars ... I like seeing
original wiring and hoses and patina .....