It would have to be more than a quart low to have trouble picking up oil at idle (assuming the car is not moving).
My first car was a 62 Impala with a 283. It leaked at the front and rear seals, the oil pan, and the rocker covers. It still ran great when I used that car up and sold it to the junk man, probably the only useful thing left.
I was pretty hard on that car.
My second car was a 64 Chevelle, 2 door post. I yanked the 6 banger out and dropped in a 327, and a 2 speed Powerglide out of a 65 Chevelle hardtop a buddy had that he totalled. It leaked oil, but not as bad as the 283 in the Impala.
I sold that car and bought a 65 Comet Caliente, 289, 3 speed full syncro floor shift. It didn't leak oil, or burn any. Fun car. Fast car.
My next car was a 66 Impala SS396, Turbo 400, posi rear end. The rear main leaked a little bit, but not enough to make me want to pull the tranny to fix it. Besides, I nearly went broke keeping tires in the rear wheels.
After too many tickets I traded it straight across for a 66 VW Beetle. It didn't leak oil. It was a fun car to load up with beer and 3 buddies, then go up into the mountains where only 4x4's dare run. If we did run into a stretch that was impassable, we all got out, picked up the front of the car and swung it around. Otherwise we always had a good time watching the reactions from the 4x4s when we reached the top of a particulary difficult stretch of road.
After that I bought a 72 Camaro. I did't leak oil. An old timer I apprenticed under showed me how to seal up Chevy engines.
A while later I discovered Datsuns, started racing one, and bought a 73 GMC dually with a 396 to pull the race trailer. Using the secrets imparted by the sage mentioned earlier, I sealed it up. It was a good truck, and later replaced by a 75 Chevy 3500 dually with a 454. Again, leaking was addressed and that rig served me well.
In 2001 I replaced it with a brand new Ram 3500, Cummins 5.9 24 valve and NVG 6 speed manual. I just gave it a 140,000 mile oil and filter change, rotated the tires and adjusted air pressures, and gave it a full inspection. I doesn't leak anything but torque.
By the way, I like the color you shot the car with. What is it from? Looks a bit like the bright colors used on the Dodge and Plymouth muscle cars of the early 70's.
Is a manual transmission coming? A 5 or a six speed would compliment the car well, especially on twisty roads, or the road course.