This is for a 1978 Pinto2.
If the right pedal is separable from the sprocket and shaft (which I doubt since they appear to be welded together), then I just need a replacement right pedal crank and pedal. I'll also need a replacement bolt and nut to fasten the left pedal back on.
Otherwise, I'll probably need the whole shaft/sprocket/right pedal assembly. The current shaft is 15mm in diameter (forgot to take down length). The sprocket is 12cm in diameter, measured from the tips of the teeth (28-tooth sprocket). The pedal cranks are 18cm in length. Let me know if there are other measurements that could help.
Thanks so much for any and all help. -andy