I have installed a T5 in a 1941 pass before.
Any 1948-59 6 cylinder truck bellhousing will work, they have the correct bolt pattern for the T5 and floor start.
The 41 side mounts on the bellhousing stay the same( these bellhousings are drilled and tapped for them).
The problem is the trans crossmember is in the way. I sectioned it and moved it back to clear and mount the trans.
The E' brake linkage will also need to be modified.
