Yes, i've retorqued the studs and i'm at 90lbs with them. This is on a stock 340 block, with super smooth finishes on both the heads and block, we also drilled the rivets and sprayed coppercoat between the layers and used silicone around the water jackets. I was really hoping not to add anything, but i guess i have to. Funny thing though, they only leak when the car is running, not when the engine is cold. Thanks for the help guys, Jesse