Hanging exercise equipment on cinderblock wall
Based on your information I would have to go with toggle bolts.
C-90 Hollow Block (1 1/2-inch wall)
An anchor sized at 1/8 inches can take 310 pounds, at 3/16 inches it can take 700 pounds, and a 1/4-inch anchor in a 1 1/2-inch thick wall can take 1,390 pounds. This increases to a whopping 3,620 pounds for a 1/2-inch anchor with a 1 1/4-inch embedded depth.
Good luck with those pull ups.