Stock 3+1 MJ springs from General Spring are $140/ea., plus shipping. You won't find a better price for new MJ springs anywhere. These would be perfect for your SOA setup IMO.
Team Cherokee:
http://teamcherokee.com/front-fender-liner-oem-jeep-cherokee-comanche-1984-1996/
Amazon:
https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=55175008
Ebay:
Everywhere. Some even genuine Mopar
Correct Mopar part numbers are 55175008 (R) & 55175009 (L)
Then I'd suspect a cracked multifunction switch inside the column. You can try plugging in a new el-cheapo $10 Dorman stalk w. intermittent, if no help then the switch (or it's associated wiring) is probably the culprit. PITA to replace.....
Do finish installing coils, spacers, control arms, tires and wheels, etc. and get the stance right before buying new shocks. Shock up/down travel needed can then be easily determined to buy the correct shocks.
TC unlock occurs through a NC switch in the brake pedal switch assembly. When you touch the brakes it removes the 12V from solenoid #3 in the AW4 to disengage the TC. It can also be unlocked through solenoid #3 by signals from the TCM based on input from the from the speed sensor (VSS) and engine RPM.
I think you answered your own question. They will do nothing in a collision, but do help protect the bumper from the "love taps" of the fools who have problems parallel parking.