driveshaft angles

It's a good place to measure up/down and side angle. I do it every time I install an engine.
Thank you, this is a great idea! Now that you pointed it out, it seems obvious, but I haven't heard of it before. I have been thiinking about how to measure side angle, and this solves that problem, and it's a lot easier than measuring up/down angle at the damper than at the trans output.

Do you know an easy way to check if the pinion shaft is close to parallel to the entgine/trans center line in the side direction, or should I just have an alignment shop measure thrust angle? I have thought about comparing cross measurements from the spring locating holes to some TBD points forward in the frame.