brake identity

[69ZZ]

Hi guys,this is my first post. I figured someone can help me with this. I have 2 sets of calipers that i would like to install on my 69 camaro,but i dont know from wich kind of car they are from.I have the brackets for the red ones and they seem to fit in the front,as for the black ones i dont have any brackets for them and i wish to install them in the rear (10 bolt diff).Can this be done?
Also what disc size i should use.
Is this setup worth it performance wise?

Thanks for any advice