What Doug said. I counted 51 on mine. The right driven pulley will seem to be off of the mark initially but will line up when the belt is tensioned. Believe me, this technique will preclude any worry of misalignment.
In my case, using the Gates belt, I could never get perfect alignment with mine, and I had it stretched as tight as possible between the two pulleys. I don't know if there's a slight dimensional variation with the Gates belt, or what, but mine wanted to align 1/2 tooth off, no matter how hard I tried to stretch it. So after several unsuccessful attempts to stretch it into perfect alignment, I finally settled on leaving it 1/2 tooth off in the "short" direction, (maybe just a bit less than 1/2 tooth) so that if the belt ever stretches over time it will move closer to perfect alignment rather than further away.
That small amount of variation is of no consequence to the engine, and I don't think I was doing anything incorrectly, because you just can't be off by 1/2 a tooth, the belt obviously only adjusts in 1 tooth increments. I backed off and re-applied the tensioner a couple times just to make sure there wasn't something mis-aligned, but it never seemed to make any difference. Also, the spring tensioner doesn't really affect the distance between the two cam pulleys anyway, it only controls the slack between the right cam pulley and the crank pulley, the tension in the belt between the two cam pulleys is controlled by the upper tensioner, which isn't adjustable.
I never thought of it until now, but the other variable in the equation was I replaced the water pump at the same time. Since the belt wraps around the WP on its way to the left cam pulley, I wonder if I re-installed the new WP just slightly differently than the original one. I can't recall if it was doweled for alignment like a cylinder head, but I think it was, so it should have been aligned the same as the old one, but I can't say for sure. If it wasn't doweled, or if the new pump was slightly different in impeller pulley dimension, that could also explain a slight difference in belt alignment, since that will affect the belt distance from the crank pulley to the left cam pulley. But again, that shouldn't affect the distance between the two cam pulleys, which is where I couldn't get perfect alignment after aligning the other two points (crank and one of the cam pulleys) so I don't think that would explain it either.
And I think I loosened the upper tensioner pulley once too, just to make sure it wasn't installed out of alignment. That has a fixed bolt hole, so not much can mis-align there.
So if anybody else runs into this weird alignment issue, don't sweat it, that was 4 or 5 years ago for me, so if it was going to matter I'd know by now.
