part number for short belt no smog pump

The required belt length can vary, depending on pulley sizes.
Does the car have underdrive pulleys?
Have any of the pulleys been swapped out? For example I have a bronco ps pulley in mine.

The best solution is to measure with a piece of string, to get you close.
This has never worked on the first try for me though. I always have to go back to the parts store at least once.

jason
 
Micro V K060775 (O'Reilys) - it's measured in millimeters and I believe it was like 2020mm or something like that, but that's the part number....right around 84 inches. You don't want it too tight and the tensioner will make up for some slack.
 
Use a ball of twin or kite string... pull the tensioner up a ways, and then cut the string. Measure it.

Or... do what I did. Find someone you know at a parts store and make them chase belts for you for awhile :D