Just doing a small 2" lift but will need to extend the steering shaft. I've looked around though my scrap pile but really haven't come across anything that would work well. This is on an 82 Brat. The shaft is bigger around at the top, just shy of 5/8*. The lower is smaller, but doubt if there is enough clearance due to the axle.

 

I'm thinking a tube to slip over each end and weld.

on later Subaru's you don't need to touch the steering shaft for a 2" lift.

 

for small lifts you can find a Subaru with a longer steering rack ujoint assembly and swap it out.  not sure what's compatible with a brat though.  someone will surely know. 

I cut the steering shaft apart where the 2 u joints connect, and slid a bushing center from an old toyota bin into the holes, welded it up.  as long as it is close its fine, doesnt spin with any speed.

I used a 3/4 inch rigid pipe and it slid right over the original shaft that I had cut. Once I had it where I wanted it, tacked it with the welder, and then took it off and welded it up nice and then installed. Worked great and is stronger than stock.

I used a 3/4 inch rigid pipe and it slid right over the original shaft that I had cut. Once I had it where I wanted it, tacked it with the welder, and then took it off and welded it up nice and then installed. Worked great and is stronger than stock.

That's what I ended up doing. I marked it then tigged it together. 1/16" tube wall thickness, hopefully that will be strong enough. I angle cut the ends so I could get more area to weld.