It sounds like you have a lean condition. Check fuel flow from the electric pump, you may have to jumper the fuel relay, it's under the dash on the right side of the steering column. Check the vacuum hoses for leaks or open ports on the carb. The Nikki carbs are not that hard to work on, NAPA can get the carb kit, and it's not that difficult to clean up and re-gasket. Helps if you have a shop manual but the instructions with the kit are good.
Check the spark plugs, they foul easy, especially if you have flooded it, also make sure you have the plug wires on the correct plug.
I hope this helps.

Spike