47-55.1 Driveshaft measurement

[Matt_50]

Just double checking some info.

For my 1950 Chevy 3100. 350/th350 with 10 bolt rear end. Leaf spring suspension.

I took the slip yoke off my driveshaft and took it with me to the driveshaft shop. I explained what I had and he said to bottom out the yoke, pull out 1 inch, and measure center to center of U joints. This sound good?

I don't need the truck on the ground do I? If both front and rear are on jack stands?