Will F, M, J-body clutch pedals work in an a-body?

Nah, I didn't. Though the thought did cross my mind pretty seriously, as I have a neighbor who has a 78 Magnum he has been trying to sell me for years and I secretly have always wanted one with a 4spd and 440...;)
Can’t you take an earlier pedal set up from a B body, like a ‘73/‘74 and use those? I thought that was the case.