Are these calipers on correct?

The late model stuff works fine on earlier cars. You just have to know who to listen to on these forums. Some people know what they are talking about and some don't.

Firm Feel makes upper control arms that are designed to work with the taller knuckles off of the FMJ cars. A set of those control arms with the taller knuckles, rear hung calipers and 11.75 rotors makes a great street setup. Custom hoses make a clean install.

One little known fact is that the taller FMJ knuckles actually weigh less than the shorter A/E body knuckles. If you're interested in unsprung weight then that is another reason to use the late model stuff.