TurboBob,
I have an extender chip that's a couple of years old, so this may not be valid info, but my car is rich, rich, rich (enough to code my O2 sensor on occasion) at idle and cruise, or I turn my fp down to about 40 or less hose off and get tip in stumble ( and still pretty rich). Car runs great when I jump on it. Car checks out fine otherwise, so I think it is the chip. I did have it burned for 92, but it turned out 93 is common here. I'll have to check numbers when I get home, but the translator and MAF were the set-up available just before the T-plus came out, I believe it is an impala maf. The chip was purchased at the same time. K&N 9" cone, solid MAF pipe, 009's. Standard recommended translator settings. Anything else, other than the numbers?
BTW, for anyone else reading this, this is no indictment of TurboBob, the cars runs hard, I made a bunch of changes at once, and left the car sitting for a long time, so I never really took the opportunity to try and have the chip changed to meet my needs. I assume he would have done so if asked.