i believe they will interchange i am not positive though most of my fords have been flat head y block FE and small block stuff never did much with the 429/460 stuff
Not Squirrel...but no, they are not. The arms are different in shape & length. A SBF pump arm has a very distinct upwards angle (starting from the pump), then goes down at another angle....the BBF pump arm is much flatter (from a side view) and has a very flat "lightning bolt" shape, if that makes sense.