1982 Chevy Corvette slight miss at idle

Engine Mechanical problem
1982 Chevy Corvette V8 Two Wheel Drive Automatic uknown miles

This is a crossfire 5.7. Ive had the throttle bodys worked on because of an idle problem which was a prob lem for crossfire engines. I think it might be a plug, could that be possiable? It runs fine going down the road. Another possiable is a leaking vacum hose. The plugs on this car are very hard to get to unless you rack it. I have changed the dist cap and rotor. The plugs and plug wires were changed about 10,000 miles ago. Anything else I could check?