QUOTE(ConeDodger @ Oct 15 2009, 10:40 AM)
The biggest reason to do this right has been alluded to by others. The #3 cylinder gets the hottest with the stock tin configuration (other cooling systems exist and are reportedly more efficient). If you put the CHT on the #1 #2 side you risk running leaner. Leaner is hotter, and the spiral continues into oblivion. Oblivion by the way makes a loud expensive noise.
The EFI uses that CHT data to decide on injector pulse time. Don't tell your ECU lies.
Now is a good time to do it right. (this should be all of our mantras)
I understand the point you are trying to make, however I could not disagree more.
A cooler temp sensor will cause the EFI to run RICHER not leaner because the oHms will be ever so slightly higher on a slightly cooler head. However the engine doesn't even get up to full operating temp before these sensors read near zero resistance and the ECU goes to it's leanest settings.
These are not accurate temp sensing devices such as a gauge sender like a Westach or even VDO. They crudely sense heat and lower the oHms of resistance and the ECU leans out as they warm. Even a dead cylinder will create enough heat through friction to begin to lean out the ECU. . .
As I've said, the ECU will never know the difference. These old ECUs are not that smart