A-block head milling

Moper
Mild cam - Edelbrock Performer with 0.42 lift, stock stamped rockers 1.5:1.0. Stock flat top 318 pistons, using 360 valves in the head and .020 milled off the head; and ideally a thin .020 head gasket (that would get the compression up to about 9.0:1.0)

Just went down to the machine shop to talk this over and they also recommended the RTV instead of the rail seals. They also didn't think the valve to piston clearance would be an issue - the owner even offered to come out to my place on his own time and check it with a dial indicator once the heads were done (one of the reasons I use the shop - excellent service).