Stop in for a cup of coffee
trying to resurrect this 1965 273
No idea if its a good idea or not. I haven't followed the saga.
Resurect to me is fixing what's wrong and reincarnating as something close to a factory 2 bbl or 4 bbl.
The 273 guys like TMM can probably guide you on the best part combos.
Finding a cam that might provide more torque or carry higher up in the rpm is reasonable too.
I just saw the cams you posted and and to me those are really high lift, and thats more than a resurect. That's a major hot rodding or racing project. In general the more lift, the high spring pressures and shorter life, but its the risk/price for trying for maximum power.
A lot more experienced and knowledgable people than me when it comes to building more performance into engines. I've just been sucked in enough to have learned a little.