Here are the differences in BBC oil pans:
This photo shows the difference in depth between a car pan and a light to medium durt truck pan.
The tall pan on the left is a truck oil pan that holds five to eight quarts of oil, depending upon the sump.
Here is an eight quart oil pan found on tall deck BBC engines used in medium duty trucks and school buses.
Here is a five quart oil pan for a 1965-'74 Corvette.
Here is a four quart Camaro, Nova, and Chevelle BBC oil pan from 1965-'72. This pan will fit your car and is the best one to buy.
Finally here is the four quart oil pan used in 1965-'67 Corvettes and 1965-74 full size Chevy cars. This series of car bodies used a BBC stock (396 through a 454) and as asuch any big block will fit with a car pan.
Notice this pan has an extra step that the Camaro Chevelle pan doesn't have.
Finally here is a seven quart Moroso Oil Pan with kick outs and notches to clear a 4.5 inch stroke:
and a similar pan from Milodon;