Try bridging pins 40, 60 & 46 as I suggested, it should work and be much cheaper. Or simply ground the black\white wire to the chassis ground by the battery.
Copied from Steve89GT...
There are a few different varieties of computers... just a few different calibrations.. Here's the #'s of most of the maf
computers that are around. A9L and A9P are the most common.
1988 MANUAL 8LD
1988 AUTO 8LF
1989 MANUAL A9L, A9S
1989 AUTO A9P, A9T
1990-92 MANUAL A9L
1990-92 AUTO A9P
1993 MANUAL A3M
1993 AUTO C3W
1993 COBRA X3Z