IWe happened to put it on the lift today after it drove around sluggishly for about 5 minutes.
I stand 6'3" and accidentally bumped my head to the rear of the catalytic convertor and it was slightly warm, not scalding hot, like the front of the exhaust pipe. ANyway, we removed it and lo and behold, it was clogged. Big time.
Replaced it with a straight pipe and changed the plugs. As of now, it is running pretty well, although the idle is a little low and it is stalling from time to time.
Will give it a nice hard ride tommorow.