In my mind, the engine position is determined by the ZF mounts and if you swap the engine mounts, you can't install the mounting screws.
But I could be wrong and I'd be happy if someone could explain how to move the engine/transmission assembly back without changing the transmission mounting points on the chassis.
Back to the Progression Ignition distributor, the one I received is significantly longer than the one in the 2021 lf-tp2511 photo at the beginning of this thread. So I'm pretty sure the housing has changed.
By the way, I finished installing mine and the engine works.