I haven't actually wired in the speedo, there was no clip on it so I have to make one for it, so as long as the speed sensor works I dont see why it wont work. The water temp gauge and A/C are still a mystery, I figured it has something to do with the main engine harness that goes to the dash plug becasue it wont even kick the idle up, and both of the water temp sensors are brand new and I know from your consult that the ECU is reading the temp correctly from the bigger one.

I'll drop by qsl tonight for a bit.