67 to 74 disc brake conversion, PLEASE HELP!!!

Ill post pics as soon as I can, I am pretty sure the upper control arms are on the right side I think I put the calipers on wrong I will try and swap them next time I get a chance, I was also thinking about getting some 15x7 rims do think that will solve my issue, also what is everyone's thought about wheel spacers, getting mixed emotions from people about them