I put a TCI mustang 2 kit in my 55 2nd series,the kit came complete with power rack&pinion power, and disc brakes.It was quite simple to install,as with any conversion you have to measure just right.I think that kit runs around $2000.now It has worked out very well.On this kit they use Thunderbird power rack&pinion.If you use a GM PS pump you must reduce the pressure from approx.1100psi down to 7 or 800 psi.