Thanks Petemcl and Mixerman. I installed the new gauge into the triple housing. All is good now. I returned the new triple back to Pep-boys. Ordered a single replacement for the SunPro setup. I however, pretested the gauge in a cup of boiling water. Wish I had done that the first time instead of hooking up all three and finding out the temp gauge was bad.

 

I dislike most new gauges now, most are made overseas (even Stewart Warner). All the gauges I use now are old made in USA types (mid 70's and older SW) mechanical and electric.