Help With Serpentine Belt

[skiwesser11]

Anyone know pretty close to length I'll need with underdrive crank pully and no smog pump? I've seen hundreds so I figure someone on here prob knows about what I should start with.
Thank you.

 

[JD2210]

It may work to just run a piece of string around the pulleys and then cut and measure and then subtract an inch or so for the tensioner.. I've never tried this but it might work if u need a custom belt length