gauge

Hey guys i am doing a 1jz swap in an 87 7mge supra. I was wondering what i would have to do to get the 90 gauge cluster in the 87 to work. mind you not using tems, or security, and im running a aftermarket boost gauge. (took the stock one out of cluster). If you have any info message me! Thanks Aj

at idle my coolant temp is normal but when i start to drive it fluctuates between normal and 3/4 of the way (towards the hot side) what could it be?

the coolant temp gauge on my dash stopped working.... i noticed the wire broke inside the connector, and the coolant temp sensor sender no longer was good so, i replaced the sensor with a new one from toyota and replaced the connector with a spade connector and soldered it together, but still...