Comp XE270S experiences?

Got one 270s in my 360 0.40 over.
-performer rpm intake , 600 cfm carb,j head full ported 1.6 roller rocker, 10.5 comp. 3.91 gear and 904
90% street use love it. Idle sound is really good
Still run A/C and have more vaccum that I want.

Car as run 13.20 full weight car