A lot would depend on the condition of the car you find, but I wouldn't rely on one as a daily driver. As a project or a toy that you drive when you want to, sure. If I were in the market for 1970s iron, I would get as close to 1970 as possible. The engines will have more power and will be simpler to work on without EGR and a catalytic converter. All makes had lowered the compression by about 1972, and some in 1971. Power was way down by the end of the decade. Taste is relative, but for me, styling really took a dive around '73 or '74.
I daily-drove a Slant-Six Duster from 1991-97 or 98, but that car was pretty much the exact opposite of what you're looking at. Its longevity was helped by the fact that it had almost nothing to break--no A/C, and manual trans, brakes, steering, windows, and locks. It had one vacuum line, for the distributor. A long trip in summer made you feel like you had been stacking hay all day. My next car, a 1987 Caprice police model with air and automatic, was luxurious in comparison.
I bought the Duster for $250 at about 77,000 miles, and it had 192,000 when the odometer broke a few months before I sold it. From points around the middle of the country, I took it as far away as Alligator Alley and Lake Tahoe. People looked at me like I was crazy, but I showed back up on time with a running car. Women ignored me. Thieves couldn't even see it.
That was a car from the days when a tune-up was really a thing. Points and condenser every 10k. Plugs too? I can't remember if they lasted longer. The last set of plugs were the much-maligned Bosch Platinums. They actually made it feel a little smoother. I did clean the cap and rotor contacts to stretch them through a few tuneups. One or two valve lash adjustments. Oil changes every 2-3k. Some repairs I remember during the 120k that I owned it:
Exhaust Manifold (The original was cracked.)
Front and rear brake shoes
Radiator
Water pump
Timing Chain (Oil use accelerated afterwards because I didn't seal the timing cover to the oil pan correctly.)
Front end rebuild, including the strange one-off A-body ball joints
Clutch
Trans tailshaft seal
Parts store rebuilt carburetor (Holley 1-barrel)
Rebuild for the rebuilt carb after a few years
Starter (maybe two)
Alternator
Blower motor
All of that was expected maintenance for a high-mileage vehicle, but I had more time for it back then. There were also the constant little things, like tracking down squeaks and rattles, stuffing vacuum hose behind the weatherstrip to stop wind noise, cleaning out the vent system so water wouldn't pour in every time you took off during a downpour driving through Austin in rush hour...