According to the production numbers I'm looking at, no such truck exists, 2wd only (for all model years, not just 72).
1972
Long-Horn Pickup - Model C/Series 20 - 133-in. w.b.
MODEL BODY TYPE PRICE WEIGHT PROD.TOTAL
CE21034 Pickup 8.5ft 3088 3950 3328
http://67-72chevytrucks.com/vboard/s...d.php?t=104816