What manual transmissions were behind the magnums and do they fit into my car

I did this on my old 70 Barracuda. 360 Magnum, Tremec 5 speed with standard old small block bellhousing machined to adapt to the tremec.

You need a special flywheel for the Magnum, I do not remember if it was Mopar performance that I went with or not. I do remember that I got one of the 1st batch & it was balanced 180* out & shook like crazy. I called them up & they swapped it out. Worked perfect afterwords.