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

Just spit-balling here...my '67 - 273 has the lo-po 8.8:1 2bbl pistons in it still, and I was wondering what the comp would be if I had, say, .030 taken off the stock '920's' head surface?

I assume I could still use my original, solid-lifter pushrods and iron adjustable rockers with the solid cam thats in there now, but would .030 off the head require custom pushrods if I went with stock, stamped-steel, non-adjustable hydraulic rockers ( and hyd. cam, of course)?