Belt size w/o smog, a/c

[Cobra Jet 429]

So I'm about to install my a/c delete kit, and I'm pondering what belt size I should go with. I'm running no smog pump and under drive pulleys aswell.
I'm sure someone here is running a setup like that.
any tips would be welcome!

 

[WillyB93]

Wrap some string around the pullies while together in the same routing as the factory minus the one you are deleting, this should get you close. If not you may make several trips to the part store.

 

[Cobra Jet 429]

come to think, I've got an old belt layin around from when I did smog delete and u/d pulleys, so perhaps I'll cut that and see what length I need.