I don't think the bolt pattern for mounting is the same.But if you were to press out the laminations from each module & swap them it might work.
Oh yeah. I never thought about the mounting pattern. I just picked up a really clean Super XL76. This thing looks like it was used very little. Hardly a mark on it. The one thing that is obvious is that someone has removed the kill switch. Upon removal of the starter cover I see the blue bomb. I have a suspicion that it may have an ignition problem. Maybe the last person thought it was the switch and just never got around to putting a new one in. That might explain why it has hardly been used.