Lead Sled you score about 75% on that answer. All B720 and 720B had Center fuel tanks with varying capacity. As I recall the standard fuel load was about 100K but could be bumped to something around 110K. Western Airlines and Continental Airlines, (I think) both flew the from the mainland to PHNL. MGTOW was about 236K for these airplanes.
Some 720B's had Freon, some did not depending on whether the buyer checked the box next to Freon
WAL had it, CAL did not. Ditto for the 707 320C that each carrier flew.
Most 720's only had one over wing exit on each side. The exception being the EAL 720's which has two on each side.
The standing joke back in those days was each and every new Boeing airliner was a prototype!