thoughts on cam?

XE275HL is sort of one step down from your current.
http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=631&sb=2

If the idle of your current cam is irrating to you, grind the above on a 112 centerline for smoother idle (sacrafice top end though).

Not sure if that cam will get you in the 12's with current combo?

Not sure how far you are in the 12's with current cam?