1967 273 cam suggestions

To the OP… what cams did summit suggest for it? Also, what head gaskets were used in the changeover? If it’s not something close to the factory steel shim head gaskets with the usual stock 68cc or more actual open chamber 318 head volume, a cam larger than a stock 318 hydraulic flat tappet is probably not going to be any help. Anyone know how far the pistons are below deck on a stock 273 2 barrel? We can come up with some compression figures to get an idea of what it’s starting with.