Yes, the truck pan interferes with the steering. The 1972 part number for a 360 passenger car oil pan is 3418 437. Unfortunately, I don't have access to the truck parts catalog.
To check the steering, jack the car up and support the front end by the LCA. Turn steering wheel full left, then full right. Observe while this is taking place.
I checked to see if late As were like early where the V-8s used a different centerlink. They are not. The late A-body uses the same centerlink regardless of engine.
http://www.forabodiesonly.com/mopar/showthread.php?t=142290
67Dart273 That is indeed scary steering. Prompts lots of questions that I doubt I'd understand the answers to.
http://www.forabodiesonly.com/mopar/showthread.php?t=142290