1) I have had one for going on 2 years, lasting okay,
Didn't fit on my 87 so I had to cut and weld it so it would clear the frame. It will blow out stock gaskets anytime you hit a rock with it. SO spend the money on the aluminum
replacement gasket. (This is for the header collector.)
2) Yes it has an 02 sensor fitting. No EGR pipe though.
Would I put one on again? If I only had the bucks to put that on or nothing then yes. For the cost of the better headers I built the whole 2" system and a new cat.
I will probley replace it sometime. And go with a plated
Y type ala Doug thorley or Calmini.
87' Zook Spoa,M/L 33's, 4.16 tcase,4.62 gears Camo,Header,2"exhuast, Cam.
Lockers, 8klb winch, -Wildweasel2 NE4WI- club http://www.cs.umass.edu/~glenn/personal.html