my first cam break in

Have you primed the oiling system? I do that as a matter of habit on every engine I can.

Fill up the carb primary bowl with fuel through the vent tube so it has plenty of fuel to get started quickly. Be careful not to slop it all down into the carb.

Set the timing in the distributor by visually lining up the reluctor point and gap while the crank timing mark is set on the desired base timing; that should get you close on timing to start.

What valve springs do you have? And what oil are you using?