73-76? Overflow tank for 70-72 tank

I pulled a really nice overflow tank off a 74 Valiant thinkin it'd fit my 72 Duster but it doesn't. The one mounting bolt on the bracket had broke loose but I tacked it back in, the bracket is mostly wire brushed down and nearly ready for a coat of paint. I'll get pics tmrw evening. I'd like to trade for one that will fit my 72.
Thanks