Yet another 273 build advice thread!

I will more than likely use the Felpro gaskets, and I think when compressed they are at like .038 or .039. I'm not a bit opposed to using the 675 heads from a 318 with open chambers if it won't kill the compression too much. I'd like it to be at least 9.0 to 9.5 SCR. I have 2 sets of 302 heads, and know I will be lucky if 2 out of the 4 heads aren't cracked!