Yes, it's possible to wire in the ammeter. First, please read the recent ammeter question.
Previous ammeter question

What size is your alternator? You might need a shunt. My alternator is only 63 amps, so I didn't install a shunt.

You said you used a kit. It's possible that the kit is not an exact replacement for the stock wiring. What kit did you use and can you provide the wiring diagram?

Gord 🇨🇦
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1954 1/2 ton 235 4 speed