wells are the same 68/69 and then a different well 70-72 -- they're not interchangeable across the 69/70 threshold
I'm not sure the date codes read that way on the body panels, I thought no one was ever able to decifer the fender date stamps (of which that number reminds me of) but the blower motor cutout template pressed into the fender you describe means it's a 70-72 well. Does it have holes for J nuts to hold it to the fenders or square cutouts where you'd put one of those license plate plastic retainers? The 68/69 has square holes for those and the 70-72 had the round holes for the J nuts.
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