Need a plan - component selection for restoring 68 340 that runs on 91 oct

Hey Rumble, I see you are no longer picking on just me.

From a standard bore 1968 340 block, what are the cam, piston et-cetera selections to get an engine that runs great on California's 91 octane fuel and is as close to original 1968 4-speed as possible? This is for a 68 Barracuda 340 Formula S convertible. I'm trying to keep the restoration as close to original as possible. So, I'm starting with a 68 block and X heads, standard crank and connecting rods.I need pistons and camshaft.


I'm interested in what your recommendations are, so please share.

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I recommend a low-deck 451 set up to run 87E10. OOps did I say that out loud?
Like said earlier;build it exactly to stock and inject an anti-detonant as required; there is your "as close to stock as possible" recommendation.
It's a 50 year old combo of a 54plus year old design. IMO, you could do a lot better,today. But, it all comes back to application.