rough running after engine reseal

I gapped the spark plugs down to 0.043 and it runs a lot smoother now. That was one of the main problems why it would chug so bad. Now it idles better, but sometimes the idle will still fluctuate a little. Another thing, The catalytic converts smoke like crazy! They don't smoke when I have the car at idle, but after I drive it down the street and back, they smoke so bad that it will come through the shifter hole and dash board. Both the downpipe and second cat smoke bad. I need to know why? Could the cats be clogged? Both cats are original.

Also, the power band of the car seems best at 4000+ rpm. It used to have plenty of power from 3000 to 5000rpm. Is this a result of the deltacams? If so, I think I like my old cams better. The turbo light comes on at 2000rpm, but according to my boost gauge my turbo doesn't build up pressure past 3 PSI.