The issue that needs to take into account that driveshafts are usually balanced up to 3000 RPM (at least this is what I have heard). With 5.13, you will be easily going beyond 3000RPM that driveshafts will see. For example, at 2400 engine RPM ( which you will easily get with 5.13 and 33 inch tires and 4 speed), driveshaft will see something like 3200 rpm all the time.
This means that whatever imperfections you had in pinion angle vs driveshaft, imbalances in driveshaft, especially the front one, are going to hurt you.
This means that whatever imperfections you had in pinion angle vs driveshaft, imbalances in driveshaft, especially the front one, are going to hurt you.