Won't Fire - Need Help!

If you look carefully of this crop of the photo above, you can just make out the mark he SHOULD be using to the left of the key. The terrible black arrow I drew is trying to point to it

The problem I'm having now is due to a bad memory and two simultaneous projects...

While building the 340 motor for my brother's Barracuda, my Duster 340 motor decided to eat a couple of cam lobes and several lifters collapsed. So, in parallel, replaced the cam/lifters on my motor. So, have try and remember what the alignment looked like on both motors... Pretty sure my bother's 340 motor had the Comp Cam sprockets that looked like the picture above with the 3 keyways on the crank sprocket... If (My poor) memory serves me correctly, think paid more attention to the "Big" dots lining up instead of the crank keyway position... Which accordingly, would be "Wrong..." Don't remember seeing any other dots on the sprocket...

So, the latest is that I improved the ground connection on the MSD Box (Was mounted/grounded to a newly painted cylinder head, manually advanced the timing, turned the ignition on, cranked the motor via remote starter and if fired up! Didn't run it too long since I haven't filled the trans full of fluid and valve covers weren't torqued down very tight (Was anticipating having to pull them again) so oil started dripping on the headers...

But now, If I aligned the dots as above, the crank sprocket might be off...

Would the engine really start with the crank sprocket that far off? What would the symptoms be??

Would hate to have to tear the front off the motor if I can avoid it, but thinking that might be inevitable.... Yikes!