I'm in Wisconsin for a few more days but moving to New Mexico. I kind of figured the w-58 and r-154 are more than likely different but didn't do any research - I also don't know if 53" is a good length for the r-154 shaft either, as I don't know if it and the w-58 are close to same length or no.
On another note - What can you tell me about putting a Mark3 dash in a Mark2? My '84 blue dash ain't nothing but trash. I have a spare black dash but I want blue and if I can make a Mark3 dash fit that would be great. I want to keep the '84 stock as it has only 75kmiles on it so I would put the good blue dash in it from one of my '85s and then either my spare black dash in the '85 or if the Mk3 dash fits I could source a blue Mk3 dash for the '85. Both of my '85s are 7mgte powered and I don't care as much about keeping them stock like my '84.