Mill head or block or both?

I got my '74 slant 6 in pieces, and missing the rods and Pistons. So I couldn't get "before" readings on the piston recession. I went with stock style Silvolite pistons in the right oversize for the bore-out job, and was plenty unhappy when I measured my piston recession upon assembly was STILL at 0.180 in the hole even though I had requested a 30-thou shave off of the block deck.
As my block progressed thru the machine shop, I had requested this much of a shave, and when they said "it's done" and I asked how much they had shaved the block/ and was told that they had taken only 6 thou off/ which was all that was needed as a clean up cut. When I reminded them I had asked for 30 thou they weren't happy about putting it back into the mill to shave the rest as I had asked for. But they did. I wasn't there running the controls but I know they took enough off to eliminate the block stampings adjacent to #1 bore.that's all I had to go by, concerning before and after.
Once I got it all assembled, I had wished that I had requested an even deeper shave off the block.
I did wind up having 70 thou taken off of the head.
But for other reasons, it looks like I will have to run the extra thick Aussie head gasket, so I will wind up with a net shave of 60-thou since the Aussie HG is 40-thou thicker than the original shim steel one.
I did what I thought was a slight clean up of the combustion chamber edges and the fire ring on a more conventional replacement head gasket will (very) slightly protrude the edge of the head casting, on a couple of cylinders. The Aussie HG is meant for a bigger overbore so the bore holes in one are larger than that of a Fel pro, or a ROL, or a McCord or a Victor Reinz HG, all of which I have had here to lay on top the head to check for that.
I just have the head sitting on the block, not bolted on yet/ I need to get a piece of Plexi one of these days so I can CC the Chambers to see where the head shave left me for combustion chamber volume before I bolt that on.