Then what is electrical on it?
Oil -> mechanical
Temp -> mechanical
Speed -> mechanical
Ammeter -> voltage independent
Fuel -> Can be used as-is for a 12V system as long as you don't ever plan to go back to 6V later (Jon G has an extensive writeup on this)
Is there something else you are concerned about? Or does the 46 use different senders?
Edit:
Here is one of the places Jon G wrote about his findings. He is generally pretty helpful and would likely offer more info if you reach out to him.
