11.75" conversion...Can I use a-body slider calipers?

Say I decide to round up the parts for an 11.75" rotor conversion on my Valiant, which already has a '73-'76 BBP disc setup. Can I get away with using my a-body calipers or do I need to hunt down a set of later calipers? I've been doing a bunch of reading and this bit wasn't exactly clear.

Thanks in advance.