Upper Control Arms

His car has small bolt pattern wheels and drums so someone along the way has changed it over (this is common practice among stock racers as the drums weigh less and can be adjusted to have no drag). It no longer has the 73-76 control arms. You can't just swap in a ball joint because the body is larger as well and it will not screw into the control arm. You can not drill out the control arm to accept the larger joint either.

You'll need the spindles, caliper brackets and upper arms from a donor car. You can buy calipers, rotors, and bearings new from the aftermarket.

I just took a set of these arms off my race car as I installed Magnum Force adjustable tubular arms on my car. That is an option also but a $300 to $400 option. If you are interested PM me and we'll work something out.