updates. removed the rotted exhaust, drilled a big access hole in the fender well, got the CPS out with an extraction socket, fabbed a new exhaust out of straight stainless pipe (still has the bend over the rear axle so I can keep my cool exhaust tip), and reassembled everything and made some promising (and cool sounding) trips around the block.
but
she's been sitting for a while when I was working on Breanne's MJ. a little too long. 3 of my 4 calipers seized up on me on the inaugural shakedown trip into town. tomorrow I address that.
but
the engine was revving like normal so I might have finally licked being stuck in limp mode all the time.