I need to know what size belt for smog pump removal.....

[mustang1313]

Hi guy's I just put my gt 40 heads on with 1.7 rolloer rockers, I removed my smog and I have no A/C, and I'm not sure what size belt to use I tried 790k6 but it was to big can someone help me out here.
:SNSign:
89 mustang gt 5.0
mac headers,high flow cat's, mac muflers
under drive pulleys
gt40 heads, 1.7 rollers rockers
cold air intake

 

[Lang]

go to www.50tech.com

they have a diagram in the tech article section with sizes

 

[Vinnietbird]

With the FRPP a/c eliminator and no smog pump,I am using a 73.5 inch belt.That completely bypasses the smog pump,no pulley needed.