Intresting thread, i've never rotated the seals either. Most of the blown eniges i've built seem to leak a little, i just chalk it up to blow by. The only other ones i've had trouble with are a line bored GM 400 blk, i started putting a .030 alum shim under the seal top and bottom and solved those problems. I do use a little silicone at the parting lines.
JMO
Zip.