You're lined up at tdc on #4, not #1. Turn the crank one full turn to align the crank pulley notch with the tdc timing mark on the cover. Since the cam turns at half engine speed, the dowel pin hole should be just a hair short of 12:00, like 11:55 or so. Both valves are closed an the rockers are on the cam base circle on #1 cylinder, which is at tdc on the compression stroke. Now you align the marks on the dizzy and stab it into the head centering the adj slot over the head stud and letting the dizzy shaft turn as the helical gears engage, and you're mechanically timed right - good enough to crank it for sure, even though it will probably idle fast since the timing is retarded about 7* at tdc.