349 CI on the cheap
I even thought of cutting the tops of the pistons .030-.040 for street use and for pump gas along with the thick gaskets and then you could get to 10-10.5:1. At .040 off the top of the pistons it would be .023 out of the top of the block which is just .005 more than the factory 340 HP engines came with.
Also too you would have to add .005-.008 more ring end gap as the top ring will be sitting closer to the top of the cylinder bore, much like the KB pistons.