Odd problem.

Can you define "a while"? LOL
If it's been awhile since the last tune-up and definitely over 35,000 miles since the last valve lash adjustment I would say you're about due. Along with everything else plugs wires rotor cap valve adjustment oil change it probably wouldn't hurt to grab a couple cans of carb cleaner and go to town on that carburetor inside and out. Then of course check all the vacuum hoses to make sure they're all connected, clean, and in good Nick.
For all that you're still under the cost of half of one modern car payment!!
And probably good to go for three more trouble free years lol!