**Milling .030 off '920 - 273 heads**

Okay I'll be the one to ask -Why ? You just got back on the road , adding 1/2 a point of compression isn't going to give squat performance wise , if it were me I would spend on porting the heads and a mild cam upgrade . It will never be a rocket ship so why not enjoy it as the sweet *** vert that it iz ?