I asked this question in a few different threads not too long ago...do a search on my posts for anything transmission related in the last couple months and you'll see some stuff.

Basically I concluded that some said you would be safe, while others said you wouldn't. From the searching I did, the aftermarket super sprag with I believe 16 rollers was adapted from C6 transmissions, and it is impossible for it to roll over...not sure how true that is, but if its correct, then maybe a billet drum isn't necessary (although definitely an extra precaution that can't hurt anything but the wallet).

The final question always came down to- how much do you like your feet? LOL