So far I have been successful with formulating the short pulse adder with the help of DSteck and information from eectuning on how data is derived for Ford programming.

After looking at a stock 2002 camaro I can see that there isn't a relation between the slopes of the IFR vs KPA and the offset table (at least directly).

Since I was able to derive the data needed for the short pulse adder, I assume there is a way to do the same for the offset table.

Ford calibration summary includes 6-15 volts offsets. This doesn't relate to vacuum but from what I read a good starting point is assume those values are at 0 KPA. I don't know for sure though.

So 2 questions really:
1. Is assuming 0 KPA for ford calibration summary offsets accurate.
2. What pieces of data (static or calculated) do I need to fill in the offset table.

I will share my final spreadsheet as I did with the short pulse adder once completed.