exactly, bgf doesn't have anything to do wioth how the engines are assembled....he's a drop shipper.
what you get from bgf, comes directly from the factory that builds the engines and puts the kits together...he's just a middle man, making some money re-selling the kits.
now, on the other hand, you shoudl be able to get ahild of him and he should provide you with a new headgasket free of charge.
i have bought several engines from bgf and i have not had a problem with any of them.
I have read bad things about his customer service, but i have no experience dealing with him for customer service.
I know that if i was the seller and you got an engine from me with no headgasket, i'd send you 3 of them for free to make up for the mistake.