So I think I posted this on a few message boards a year or so ago, but didnt get any response so Ill throw this brain teaser out here again as I am about 3 weeks away from starting the car.. (I hope) and hopefully this fits the computer forum.

I have an 89 iroc that I am swapping basically everything out on and with that I am swapping in an Electromotive Tec II (Yea I know the TEC III is out now, but I started the project somewhere before time began), which has me absolutely salivating, but it does lack a few features..

For example, to lock up the torque converter in OD I will have to use the stock computer because the electromotive has no way to sense what gear the car is in.

Or....

Keeping cruise control would also be something I would like to do and I cant think of any way to do this without keeping the stock computer? Though admittedly this has been my lowest priority so I have virtually no research done on how the cruise control actually works, though I was told it reads the VSS sensor in the speedo.

So....

I guess I am really looking for input from someone who has done something this dumb before. Is it outside the realm of possibility to piggyback some sensors to both computers with no ill effects? For example the TPS? Also, what do you suppose are the minimum number of sensors that I would need to make the stock computer run. Coolant temp, TPS, tach input, VSS? All the FI and ignition related tasks will be handled by the new computer, but how much do I need to keep the old computer in the loop to get the other functions I want? Is there a creative way to do some of this stuff in other ways?

SB