OK ,so I'm putting a 331 in my '72 pinto and had noticed the front rotors are pretty worn out, I checked with the local parts stores and they say either they can't get them or they are $132.00 each. Anyone know what you have to do to put '74-'80 rotors on? Is it just replace the upper and lower control arms for the newer ones along w/spindles? OR can you put the newer balljoints on and spindles? Thanks for any help. '71-'73 parts are not that easy to come by around here, '74-'80 not too bad tho.