Can't see why it wouldn't be smokable -I don't know if we ever used 6 oz, but we used to make giant spliffs like that all the time back in the '90s. We'd stick two Sushi mats together with about 10-15 king size Rizla, and fill it with weed, hash and coke
It's a skill to keeping it burning evenly, but do-able ...stick on some Temples of Boom and you're good to go!
sounds like a waste honestly. i remember watching a video of him rolling a fat *** HUGE joint, sprinkled with kief and dipped in hash oil but instead of paper he used this hash that was veyr pliable. dudes were coughing like a MFer after the first hit.