Our 1984 wagon power steering leaks like a sieve - not the pump but the part on the rack. I had the seals replaced some years ago but it soon started leaking again. I'm seriously considering taking it off and fitting an early 505 manual rack (4.5 turns lock to lock). I can see that the lower part of the steering column would have to be swapped also since it's longer with the manual rack. Would welcome any thoughts on this. Also, is the 504 rack the same as the early 505?