Adding A/C to a '66 Smog pumped V-8

[triple-aught]

I have a 1966 289 2v cal car with a/c, p/s, and a smog pump. the a/c, smog pump and the crank pully run off a third belt closest to the rad. the a/c needs to be inline with the smog pump to run on its belt.I dont have a picture rite now but will take one later My problum is i want to delete the smog pump but keep my a/c if i remove my smog pump i dont have a third groove on my water pump for a shorter belt can anyone tell me how dearborn cars set up? is it a water pump pully with 3 grooves and a shorter belt?