[1928 Sport Coupe]

My 1928 Started backfiring through the carb after running great for an hour or two. I thought it may be running out of gas. After adding gas it still backfired and had low power. I put it in the garage to replace the steering gear with a rebuilt two tooth.
I checked the timing and points and found the point gap was less than .014. I readjusted the points to .018 and it seemed to run better, but I could not get it out on the road to test. Does this sound like a possibility? Could the condenser be bad and cause this? The distributor was rebuilt about a month ago with a new condenser installed.
Thanks