I put the piston in with the top 2 rings in and filled the gap between them with grease. I lowered the piston .700 in the bore. It took 118 cc's to fill it.
Then I cleaned out the alcohol and dried the piston, then I filled the sides with grease level with the top edge then filled in the valve relief with grease level with the flat surface of the piston. It took 113 cc's.
The dome height of the pistons is .580 I can't find the TRW listing for the dome volume because these piston haven't been made since the 70's.

4.155x4.155x.700x.7854x16.387 = 155cc
155-118= 37cc
155-113= 42cc
Which of the 2 totals 42 or 37 would be the best number to figure the compression ratio.
As of right now with the heads at 126cc and a 4.280x.039 head gasket and 0 deck I get
9.61-1 with the 37cc figure and 9.90-1 with the 42cc number.
I used the formula that is in Chevy Rat Motors book by Ed Staffel
Thanks for the help

37cc's

When you filled the valve reliefs you removed that volume. It should be included. In the first test, you included the crevice space around the piston above the top ring. This is a good way to do it so when you calculate the CR it is already included and doesn't need to be calculated separately. If you use a CR calculator that has inputs for this space, set them to zero. 37cc is what I'd use.