What carb for 356 cam?

Hard to say but if alky use the 390 carb or for even more bang use the tilly hl304 or 348f or hl 360
this cam likes 8800+rpm 32-37 single springs or dual but pockets need to be cut.
if you milled your head or decked the block shorter push rods will be needed
and with this cam I would stay 1:1 ratio.if you want to keep the stock size push rod
then use the gx160 lifter.and use molly rods
i found the 5.175 chrome moly pushrods are the right length for the cam (learned from having two bent pushrods).....this is using the stock lifters and the stock rockers....