First time engine build won't fire

MOPAROFFICIAL said
Turn the distributor counter clock wise a bunch and then try it, if all else is right... could just be retarded.

Turning it too much one way or the other can get you where it won't start...

I prefer to find TDC, then set the engine to 10° BTDC and crank it up.... I've had good luck getting fresh engines to fire at 10°....

Then adjust the initial timing to max vacuum and try to get it to idle as smoothly as you can...

Then set total timing at 2000 - 2500 RPM after the engine reaches running temp (160° - 180° F)...