rocker shafts installed backwards... long read. but pics!

It couldn't hurt it to take em off and swap just the shafts side to side. Lay some clean paper towels down to lay them on when you take them off. Lay them like they are oriented on the motor now, remove the bolts from the shafts and gently slide the shafts out while leaving the rocker arms laying in their positions. When you look at the bottom of the shafts, 2nd bolt hole back from the notch should be slightly bigger to allow oil up into the shaft where it will drip into the rocker arms to oil them. Yours have no doubt been oiling thru the pushrods, but being installed right can only help. The notch should always go down and to your left, not matter which side of the engine you're looking at. Just slide the shafts back thru the rockers that way on opposite sides you took em apart from and bolt em back down with the pushrods all lined up and you should be good to go.

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