Speedway TC

I can't find the thread, but someone pointed out that a Comet 20 series would work on my Shrike where they used a Salsbury 5" TC. Was that Symmetrical or Asymmetrical?
I replaced the Salsbury 330 on my Arctic Cat mini bike with a 20 serries. The driver stuck out further and wouldn't line up with the driven that was all the way against the frame. It would work sorta OKish. Idk if your bike has the room to move the engine over or the driven over.