Got some surging issues happening, so I thought I'd see if you guys had any ideas.

When accelerating and cruising you can feel the car's output surge up and down and hear the exhaust rev a bit as it does it. It doesn't rev enough to seen the tach twitch much more than a hair, but you can definitely feel it.

Motor's still the stock 1983 carbed 5.0L with 192,000km (119,300 miles)... wanted to upgrade this year, but that's another story. Plugs and wires are brand new last month, fuel filter's all good (plus I added fuel system cleaner and cleaned the carb up just for the hell of it, but no change), clutch is a Centerforce II about 7 years old (about 55,000km / 34,175 miles) and still feels pretty good.