Temperature sending unit, Please help

[sandaddict]

Temp gauge has gone out on my 94 Thor Columbus. I replaced the sending unit on the front of the block but come to find out that is for the ECM only. I was told to look for a single wire unit. I found two, one in each cylinder head with single wires, but was told these are for A/C off and on.Has anyone here had to replace this unit and if so, where is this thing at?....1994 Tonawanda chevy 454.

I've used the search function and couldn't find anything.

["007"]

Here is a Google search maybe you can find your answer there.
Welcome to irv2.

[gasser 38]

last one I did (along time ago ) was L drivers side head toward rear wire was routed down intake around the back of valve cover sorry do not remember the color