well the 272 camshafts are obviously different to the eye, as...well...the cam lobes are physically MUCH bigger, but that looks stock. It'd be very hard to tell unless they're rather big, big enough to induce a loping idle...
Best way to check though, some garages, or a camshaft company, will be able to measure the specifications of the camshaft...rather than guesswork, that WILL give you the answer