So, after reading up on JB weld, there are plenty of people using it long term on their car gas tanks, so I think it'll stand up to seal in my hose barb I have...
ALSO, I have some cracks where the manifold outlet (?) connects to my airbox, do you think I could epoxy those cracks over as well? They are about 1/16in. to 3/32in. in width (pics later).