the reducer is for going to 12V with the original sender/gauge - prolly have to be done as well assuming the truck will have updated engine and 12V .... it occured to me the vintage vendors will likely have the adjustable universal senders too, and they do, like this

Bilkl


Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot