That is just the thing, I am not satisfied. There is always the need (or want) for more. I have learned a lot about what the XJ is capable of and the mods that can be made. The reason I am not too satisfied with the 4.9 Stroker is the fact about the expense, the mods needed, and limits on the engine. The engine gets sh*tty mileage and there are limits with the AW4. I have taken care of most of the limits with the AW4 overheating issues short of rebuilding it with stronger parts (yes, there are rebuild kits out there). Needless to say, the adjustments and expenses never seem to cease.
In short, to shorten all the small adjustments, headaches and expenses, I think it would be better to start off correct from the start with a V8 & transmission package (as one developed unit) out of a donor vehicle.
As for the OBD I and OBD II questions, I would get rid off all the old sensors and wiring from the XJ related to the ECU. I would take the XJ instrument cluster and remove the stock guages and build a new cluster with after-market GM compatible guages (there are plenty of them out there). I would use the PCM from the donor vehicle and make minor adjustsments (tuning mostly). Essentially, it would be a Jeep with a GM heart & brain transplant. Yes, my last name could be Frankenstein.
All in all, I am thinking about building a sturdy platform with reinforced frame, D44 front, D60 rear with either an LQ4 or LQ9 engine and related transmissions (4L80E and 4L65E respectively) out of a newer Chevy 2500 or Cadillac Escalade. I should at least get the mileage of those vehicles with power, aftermarket support, and reliability to boot.
All in all, do any of these XJ projects ever really finish??
Food for thought.
I will post pictures once this beast is finished.
:explosion