Timing tech.

I still say find tdc with a piston stop and apply tape. Bypass msd and fire coil with points. Adjust point gap to spec that'll pretty much take care of dwell as its not adjustable unless you alter the can lobes. Time with vacuum port off and plugged. Time it to 34 up to 2500 rpm, then let it settle down and look at where it lands, that's your mechanical advance number. Remember you double the cam degrees to see crank degrees so if you drop to 12, your mech advance is 11 degrees. That's what you got to work with, plug vacuum back in and see how it runs. Dwell is time the points are closed in degrees, the recharge time of your coil. 318s were 34-38 degrees. Dual point dizzy gave you more dwell because it used 2 point sets offset a tad to provide more charge time.