Yea, I calculated those overlaps at .05, I'll edit the orig. post here in a min.
A link to the systemax II package, with some details
http://store.summitracing.com/partdetail.asp?part=HLY%2D300%2D503%2D1&autoview=sku
Valve Angle: 20º Intake Runner Volume: 184cc Exhaust Runner Volume: 68cc
Combustion Chamber Volume: 68cc
Intake Valve Diameter: 2.02"
Exhaust Valve Diameter: 1.60"
CFM flow @.5" lift 223/173
Deck thickness: .5"
It looks like my Compression is 9.55:1 4.03" Bore, 3.38" Stroke, .039" compressed head gasket, and 68cc cylinder head vol. Stock pistons