I'm planning my drill strategy now that I have both the M40 and M41 out of their respective cars. I'm switching to an M41, but using the long shifter and top plate from my M40.
Here is a picture of the M40 top plate. Note that the reverse switch doesn't appear on the top plate itself, but to the rear of the main housing on that little shelf.
Next is a picture of the M41 top plate. I've noted what I think are the reverse and overdrive lockout switches.
Finally, a picture of what that little shelf looks like on my M41. It is bare on top, with no switch.
What I'm thinking is that I find a way to remove the reverse switch and shelf from the M40 and bolt it directly on the M41, replacing its bare shelf. Then I simply drill and tap the hole in the M40 top plate for the overdrive switch.
Two questions. Can I convert the M41 to an M40 style reverse switch, which looks much different in size and location to the M41 variant? Second, does that little raised semi-circle I've highlighted on the M40 top plate actually mark the location I should drill, or am I being too optimistic?