Editing How to check driveline angle

on a driveline for a very short driveshaft as in 11" for a t-bucket could you use a level if you didn't have a angle finder or a protractor? (example, if pinion shaft were to read 1/16"of bubble up and trany shaft 1/16' of bubble down could it be considered close enough to 0 degrees to call it good?  or does the extrme shortness of the driveshaft require considerably closer measurements?