I'm pretty sure its my old MSP that you bought. The A/F gauge is a wideband. The boost should not be hitting 10 psi cause i never had it set at that so i don't know what the dealership did to the boost controller before they sold it to you. Your pretty much mentioned all the mods on the car cept it is a Hiboost FMIC on the car and you have a corksport downpipe/muffler on the car. Had to put the cats back on the car when i traded it in. So turn down the boost in a hurry. Oil was changed every 3K miles. You have an awr rear motor mount on the car and i replaced the differential at 60K miles with a welded one. Also the car has synchromesh tranny fluid in it. Send me a PM if you have any other questions.
