Motor help needed

Looken @ 700+ on some custo made slugs rusty RR. Thease are about the cheapest option for us nutty 273 guys! 015 isnt even gonna come close to the 10.5:1 comp man. I used the kanter pistons for the same reason, egge couldnt give me a date when they make any more of them. Im not bashen them by any means just wanted to get my engine running before winter was over. Cylender heads were the same between the 2bbl motor & 4bbl motors. The kanters have a cool teflon coating on them aswell to.