Engine cam break-in - What should I do with my 340?

Do you have the carb you took off of it?

Nope, the carb and distributor have been lost somewhere in the 34 years its been since it got taken out of the Barracuda it was originally in :D
It´s been gathering dust in a garage since then, I got the engine as a rent settlement (well, my dad got it) so we just got it as it stood.