Hit a Snag - Universal Joints

[Enoch]

Hi folks, have been busy building and am now trying to join the steering column to the rack. It is giving me a massive headache, I just can't make it work and still give me the angle I need in the run to satisfy the IVA man and miss my exhaust downpipe. The donor car had a really weird double uj sort of device that attached to the rack, there was a uj right up near the column. It won't work on my car because the angle is too steep and it just locks up. What I was thinking was to put a standard uj on at the rack end and try that. What I don't know is where to get a UJ to fit. The shaft I need to attach it to is 5/8 inch / 16mm diameter. Anybody got any ideas? I thought about using a Sierra one but from memory the steering rack splined shaft was only 1/2 inch - can anyone confirm if that is the case?