You should get Amazing Spider Man 250 and 251 as they complete the story started in 249. Also 276, 278, and 280-289.
Spectacular Spider man 85 and 130, 178-200,241-255, 259-261

Web of Spider Man 14-15, 29, 50

Avengers 158-162, 164-166, 167, 168, 170-177, 181-191, 255-285

Captain America 275-289, 302-332, 336-350

Iron Man 115-150, 215-250