[Christ]

I changed the gap on the #1 plug, it was initially a little under 100 thou.

There are a couple that the ground straps were slightly offset from center, due to careless gapping, best I can figure.

Clearly, those plugs are very old. I can only wonder how old, as it honestly appears they'd almost never been changed in 160k. Never seen 'em get that bad, personally.

I'm going to keep checking my new ones periodically to make sure nothing's going on w/ the engine, but I don't see any evidence of lean/hot/rich, etc.

I do run the engine as low as 700 RPM under load (no shaking or anything!), so I'll also be checking for "dieseling" and coke buildup from incomplete burn, just in case. I know the carb'd engines can handle it, but w/ the knock sensor, it might be affected slightly by lower RPM high load operation, so I'll keep an eye out in case I need to disconnect the knock sensor.