houleyh, you will have to put the crankshaft sprocket on and the cam shaft sprocket on for a temp fit as these have a small punch mark in each for alignment. A couple of things, the crank should be pointing north or straight up and the other is the cam sprocket can be arranged in four different places, so be sure your timing for #1 is correct. If you have new sprockets they may not have the punch mark, so just start off with the crank in the right position and go from there. Wayne (Hope you have a DIY book.)