another Scarebird question

Been thinking (obsessing)over what to do for a disc brake conversion on my 67 Dart (10 drums). Right now it is between the scarebird kit or 73 and up. Couple questions on scarebird, are the parts easily and redily available? Did a disc brake kit on a 51 Plymouth (think it was a Ply-do kit) used Chrysler rotors and GM calipers, the caliper bolts were for a Cadillac and took me about 4 parts stores before I found them. Also does anyone know what aftermarket wheels will fit (been obsessing over some Keystone Klassics). And does this kit change alignment, the kit on the 51 moved the steering arms in 1/4 per side.
On 73 and up, I found a k-member, and front suspension parts inside a 48 Plymouth street rod project that had a volare front suspension installed, looked to be a-body(I think)at a local u-pull it. How would I verify loose parts as being a-body.
Thank
Aaron