Since you've measured brake reach and believe that's OK, you've cleared the biggest mechanical hurdle. There are some issues of rear axle width, but you can simply measure yours and read the specs for what you're buying. Worst comes to worst, you can spread the rear triangle of your metal frame to fit the new axle.
The one thing you should keep in mind is that you'll be lowering the bottom bracket and losing some pedal to ground clearance. It's a difference of almost 1" from the rim but will be less than that depending on the comparative width of the tires used.
The only thing I can suggest, is that you ask yourself what you hope to gain by the switch, and decide that it makes sense for your needs before spending dough on a pair of wheels and brakes.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
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