thanks all ..l think l have worked it out
shorter one ek longer one fc auto only has three bolts for steering box mount
ek one has only two
Greg,
This is not right, all Holden steering boxes up to and including EH had a three bolt steering box, HD-HR had only two bolts. The later HK-T-G steering boxes were separate to the steering column and utilised a collapsible column. There were no FC Automatics. I would suggest that based on the information that you have supplied that the auto column is for an EK. I do not have a parts manual to check it with, so this may be incorrect.
I would suggest that steering box that you have with 2 bolts is a HD-HR type box, and that, at a guess, would have the part number 88-7423138-p
Regards
Keith