#2 7 blade 19-1/2" diameter 2-1/4" pitch Thermo clutch 67-69 firebirds V8 w/AC GM# 9796372 it sounds like you had all the right components were there. some type of failure occurred. Were the fan blade rivets good? Are you sure the clutch is good? What do you mean it blew up, the blades flew off? Check the site out and it'll help I'm sure.