Carb selection help, please ?

just buy a 71 to 74 bb 400 use the 383 steel crank ,standard 675 rods with arp bolts,good standard 906 heads, kb pistons , lunati hyd voodoo 305 cam , adjustable rockers nice but not required ,a mp distributor kit with orange box, shoot for 10.0 to 1 comp. 750 holly and 1 7/8 headers with 3.5 collector .voila, over 500 hp and will run forever