I think 1 crank tooth would be 40° whereas 1 cam would be 20° but I don't have any of the gears in front of me to double-check. Either way I doubt you'd be off a tooth and run reasonable at all since your timing chain, if original, probably has 10°+ of wear / stretch in it. Mine had about 12° and I replaced the chain, leaving the original aluminum-backed rails, and that got it within 2-3°.