Wiggilez's 1963 valiant

here's what you want for a start: AMD used to make them but they are discontinued, look up frame caps for an idea on how to use U channel for a weld in cap repair. Or PM @Lee Robinson and ask him when he's breaking a early A up again.
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Will do.

Was there a 63 Dart in Canada?

I'm not 100% sure, most of my mopar knowledge is renix era jeep comanches.