79' 360 2BB

Also, I almost overlooked it, but even though that's low miles for the year, be sure the heat crossover is getting exhaust flow through it. They are known to clog, to the point
of packed completely shut, and the engine runs lean & hesitates. Usually a side effect is the choke is slow to open fully, & the idle takes a bit longer to kick down to base idle.
Check heat riser flap & be sure it's working also.