‘Stumble’ GONE

... so the only thing I changed today was the thermostat in my sons 74 Duster.
Went from 180 to 195 for the winter.
We were having hesitation problems all along in this 318 auto 2 bbl from a 72 Challenger donor car.
No more STUMBLING.
No more HESITATION.
OEM is 195, guess that’s what they need.

Weather???