steering coupling

Check my "facts". I recall the 72 has the earlier power steering gear and 75 the later. The main difference is that the early one has a smaller diameter output shaft (where Pitman arm attaches). The later steering gear is the same as all C-bodies (like my 65 Newport). I understand that the input shaft diameter is the same. However, on my 65 Dart there is no key on either the gear or column coupler, which could cause problems in mixing parts.

There may be differences in the hoses, depending on the power steering pumps. The TRW pump (on early cast iron water pump) has an inverted flare on the high-pressure port, whereas the similar-looking Federal (or "Chrysler") pump (on later alum water pump) has an O-ring fitting. I dealt with that. I recall the return hoses also vary. I had to take the return fitting off a later pump. I was also installing an oil cooler from a 90's Dodge truck, so might have been why (forgot).