1) No rewiring of the stock harness or connectors is required. The extra I/O signals are unused by the 8051 PCM. Leave them alone to allow easy swaps between the stock '96 PCM and the 8051.

2) The knock sensors in the '96 are 100k ohm while the '94-'95 style are 3.9k ohm. In the 8051 PCM, the knock sensors are in parallel on Blue pin 22, while in the '96 each comes in its own pin (Blue 21 & 22).  Easiest fix for this is to leave the stock '96 knock sensors in place and modify the 8051 PCM for them. Internal to the 8051 PCM, you'll bridge Blue 21 & 22 together and then place a 2k ohm resistor from
these pins to ground. This simulates the correct total parallel resistance that the PCM expects to see in order to pass DTC43 while also keeping the knock sensors active. You could also just swap over to the '94-'95 style sensors and simply bridge the pins together while omitting the resistor. Either solution works fine.

 You will also need a tach conversion circuit, since this PCM, a 1618051, outputs an 8 cylinder tach signal, and the 96 Impala SS cluster tach REQUIRES a 4 cylinder tach signal.   i.e.  your 96 tachometer would read 2 times the RPM if you didn't fix this little problem.

(7-19-2011) There USED TO BE 3 sources for tach conversion circuits.  Randy Acorcey, Sank Williams, and Eric Bryant.   I believe Randy and Eric both sell their circuits publicly.  Sank has reserved his for local club members at the moment, since it takes about 1 to 1 1/2  hours to put one together.    Not sure currently if Sank would be interested in building more, but you could ask.

 Wiring this puppy into the PCM is a little more tricky.  It requires you to disable the normal output from the PCM and solder in 4 wires ( in the Sank Williams design ), the only one I have personally installed.

 I will took some pictures and get can post more detail shortly.   This page is a work in progress, but a labor to SHARE FREELY the information I have collected doing this myself.   I am updating it for Blair's efforts on a 32 Ford for a mutual friend of ours.

Efforts for putting an LT1 in a car like the 32 Ford require a lot less wiring, but patience will reward you.    The PCM will also need some tweaking to get diagnostics turned off, and other tweaks depending on how many of the original features of this PCM you want to use.

For programming sources I subscribe to either Bryan Herter/Alvin Andersen of PCMFORLESS, or Ed Hutchings at Automotive Technology.

For more info, don't hesitate to contact me.

Gerry-