First time engine build won't fire

whats your firing order? Look at distributor: 18436572 CW. Top of compression in driver front (#1) pulled plug should be pointing to or very close to #1 on tower which could be anywhere. Easy to wire backwards if you grew up on B/RB's. Also, look at the crank snout (under the bolt and washer) for the keyway. Its almost always at 1:00 when at TDC. Something you can check without taking the timing cover off. I have started a motor with a propane torch head stuck in the open throttle of a carb with no gas in it, an option if you think your carb is SNAFU. I think Mopar did that when setting the distributors along with a damper probe.