OBDII didn't become mandatory till 1996 and a couple of manufacturers put it in in 95.
No one had it in production in 92.
I think you are confusing throttle body fuel injection (LA motor) and port fuel injection (magnum engine).
Your probably right, but the 92 harness is different from the 90 harness, and both were 3.9 throttle body motors. The 92 also has an underhood fuse box that the 90 does not have. My 93 port injected 3.9 has a different computer then the 90 or the 92, which both appear to be the same. Gene
