Yep, call the shop that will be doing it and ask their method of measuring, it varies from shop to shop. Another point: Measure with the weight on the car resting on the tires at ride height. I did one where I had the car up on jackstands with the tires hanging free, and when I put the shaft in and lowered the car it was too long! The shop took pity on me and only charged me $ 25 to recut it.

I only made that mistake ONCE.

Don