It will he fine, stock blocks have no issues till.you get over a magical 512 number in full race mode,
I run stock rods shift 6500 cross the line at 6800.
A 494 (500)) ci will have no issues , in fact should be a great build
Far as camshaft goes you have to ask is it race or street ,or combo.
Really not much difference, .
I'm not a large centerline guy never want to see a 110 or above stuff
That kills low end , a 494 will be have a ton of tq so why build something that requires rpm ?