1974 D300 360 fresh rebuild will not start

Well fellas.... 60 PSI still. 70 with the throttle plates open... Was the carbon on my pistons the only thing making a proper seal before I took this all apart??

Also, adding a hefty table spoon of oil raised compression by 30 psi. Soooo.... Also, this engine has been rebuilt before, so it's already at its max bore :/