Just make sure when you put them on your pushrod looks straight and the other end is centered on the valve stem. I did the same thing once and it took me a few minutes to get it straight.
As far as the notches on the end of the shaft make darn sure as said above you have them oriented correctly. The notch is to the front and down on the driver side, notch down and to the rear on the passenger side. If not you won't get oil up to the rockers.