I am installing the March Performance pulley system on my LS1. They no longer make a cover for the harmonic balancer. Speaking with them, they said it threw the balancer off balance.

I think S&P makes one. While it wouldn't necessarily match the March, it may be better than nothing. Of course, that is down low, maybe I should't worry about it.

I wonder if that is a general problem to consider, of if maybe they just had problems with theirs.

Anyone have any experiecne using a cover, and run enough miles they are comfortble with it?