318 with 360-587 1.88 heads

Your last link didn't work for me. But here's what i got with the other info.

Using 72cc stock heads with a .028 gasket, the original Sealed Power pistons and .080 below deck it comes out at 7.7 to 1.

With the KB's and the same calc. it's 8.82 to 1.

Now with a 68cc it's 9.20 to 1.

And 65cc it's 9.51 to 1.

There's more calculations, but the head chamber cc will really determine where it's at.