When I decided that I wanted to replace the wiring harness on KITT, I knew that I wanted to use a wiring harness from Painless Performance. They have some of the best wiring harnesses available. I have been gathering parts that will be needed in order to use their electronic fuel injection harness. Troy had the ECM #1227747 and I just recently found the 5.0 L EPROM #16139492 and Calpack #16060836 from a seller on ebay.
The last piece I would need to make the EFI harness functional with KITT's Cross-fire setup was the Painless Wiring Cross-fire Injection Adapter Part # 60112. Unfortunately, this part was discontinued by Painless Performance in 2011. I tried unsuccessfully to order this from five different online vendors that still showed it as in stock on their web sites. Each time I was informed that they could not fulfill the order as the manufacturer no longer stocked the part.
Feeling frustrated I called Painless Performance and spoke with Mike in technical support. I explained that I wanted to use their EFI harness to power KITT's 1983 Cross-fire injection system, but that I could not without the adapter. I also explained how many stores I had contacted looking for the part. He said that he had one on the shelf behind him and that he would check with the powers that be to find out if he could just sell it to me. He took my number and promised a call back.
He called back about 15 minutes later and said that he could sell it to me for well below what I had found it online for! It arrived today. Thanks Mike!