Can an AM/FM antenna be used on an AM only radio?

[Mister-B]

I removed the crappy aftermarket stereo a PO installed in my truck, and I bought a beautiful fully functional original '69 GM Chevy truck AM radio off eBay.

My antenna is broken, so I need to get a different one. When I look at parts sites, it says the AM only radios stock used the telescoping antenna, and AM/FM radios used a solid mast. I'm all for trying to keep the truck period correct where possible, but telescopic antennas snap easily. Can I just use the solid mast one?

Also, has anybody had luck using an antenna off a chevy can or other chevy truck, that looks close to original? I might be able to just get something at the yard that would look as good as one of these parts from LMC or Brothers at a fraction of the cost
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