I would think it would work because the old sender on my full cluster had a single wire, which is a signal wire. If it's the same wire that runs from your coolant temp sender, I believe it would work.
Here is some information I found useful while doing a cluster swap on my 87. I was able to combine these to figure out what everything did, as some stuff differs with the years.
I hope this helps.
-Matt
I'm new to the forum and figured I should introduce myself. I'm a senior in high school in South Dakota that has spent the last 3 years working on a 1987 K10 single-cab short-box with 350 TBI/SM465/NP208 with some help from my father. The truck has come a long way and these forums have been...