383 build no power

I see the crank now. You need to get the dam cam dot at 6 O'clock so you can see it. In other words, rotate the crank 1 turn. Then take a straightedge and jiggle things until you see if they line up.

Get a degree wheel and plan on advancing the darn thing

Also, which mark / keyway are you using? I can't tell, is it straight up, advanced, or retard?

You could also just play the odds. (I wouldn't) figure out which slot is advanced, and put the thing together using the advance keyway.