You'll get lots of different answers on this question. I don't build a lot of engines anymore, maybe 2 or3 a year. I donot use them unless the buyer wants to use one, and if they do i insist that they buy a stud kit for the pan, or i let the buyer install the pan. I've got one hanging on my wall for a sm/blk for the last 3 yrs. and nothing i have has one on it.
On the other hand lots of people swear by them.
JMO
Zip.