360 la build

Hi have a few questions - a good carb needed, should I advance the cam for my elevation? And should be ok with 91 octane?
The build 360 la 79
Pistons KB 107 down .005
Rods with arp bolts
Stock crank , windage tray
Promaxx alum. Heads 2.02/1.60 ,63cc,1008 gaskets
Hi volume pump , 273 rockers 1.5 or 1.6 have both
Rpm air gap carb for now 625 competition carter ,tri-y headers 2 1/2” pipes
Cam Racer Browns 272 ,108 in at 105 ,226 degrees@50 , 470 lift hydraulic
The car 65 Barracuda 4- speed , 3.55 , mainly a tire frying cruiser haha also at 3000’
Hoping for 360-400 hp