[vince1]

I've done it to a 68 and a 66. Both times the pieces came from the junk yards. On the 68 I got the box from one truck and the pump from another. On the 66 they came from the same donor. I think 68 on up is good but somewhere around 1980 they switched to metric fittings. At the back of the pump the fitting can be switched from standard to metric or vice versa. As for steering box ratios or other anomalies between the years I haven't a clue.