Cool car for a driver.
I had a slant-six Duster that once was In Violet (Plymouth's name for Plum Crazy) but looked ugly as homemade sin by the time I got it. I drove it all over the country, adding 120,000 miles before the odometer broke. It had a dual master cylinder but manual everything and no A/C.
--Assuming it has manual drums, you might be able to improve the brake feel by adjusting the star wheels.
--I also found a little more highway power by swapping a bigger jet into the Holley 1-barrel. Mine came from a dealer in Colorado Springs, so I think it might have been a little lean.
--If you ever buy another carb, don't get rid of the old one. I got at least one rebuild that ran like junk.
--I never had problems with mine, but a lot of Mopar guys say to carry a spare ballast resistor for the ignition. I did carry points and a feeler gauge.
As a side note one thing you should check and keep a couple extra in your car is the nylon gear that goes on the end of the distributor that also works off the camshaft it's sacrificial if it's a problem with the distributor the nylon gear will shear if it's been in there long enough it's probably cracked and was held in with a drive pin
TOMB
Good advice. I found out about the plastic gear after dropping a points or condensor screw down into the distributor. I even remember seeing spare gears on those "Help" cards at one time.
Have fun with the car!