[rsk289]

Can anyone tell me how the steering rack was mounted on a leafspring car?
I have a Kirkham frame and the rack installation calls for four aluminium spaces under the rack mounts to raise the rack by about 1/2 - 3/4". Is this likely to be a mod to improve geometry, or was it original?
Main reason for asking is that the rack is too high to allow the cast coolant tube to pass through the frame on that side. To lower the rack would require some metal grinding for clearance.
Thanks
Roger