To go along with the wagon’s IRS conversion, I planned to replace the old U-jointed axles with CV joint halfshafts. In theory, CV joints have less friction, so that allows more power to get to the wheels. They are also less prone to failure under racing conditions, especially when using a welded differential. I am using BMW E9 CV joints and axles (got ’em used from a BMW dismantler), stock stubs, and had the steel adapters machined up for me. My buddies at IEM Racing and The Moore Speed Co were integral in making this DYI kit work for me.
The BMW e9 is the early 70’s 2800 and 3.0CS. The CV joints and axles are stock BMW components. I don’t have the dimensions, next time they are off for service, I’ll measure them. They required about a 1″ thick adapter to be custom machined for them to work, as all CV joints require. I went with a steel adapter instead of aluminum (as some conversion kits do) as I wanted this conversion to be bulletproof. I used them because they were the right size, they were available to me at the time, and they were stout enough for my application without being too heavy.
Did you modify the cv axles to fit or where they taken off the car that way? Also I looked up a BMW e9 and didn’t a lot of info. Can you give me more info like year, make , model ect. Specs of the axles you know length and dimensions.