fixing stripped carb bolt hole on intake

hey guys,

it seems that i have stripped the threads on my rpm air gap manifold by tightening down too much on the carb bolts. There is now a vacuum leak there (rear passenger side bolt) since i cant get it tight. Does anyone have any suggestions of how i can fix this without taking the manifold off? should i tap it a size larger? tap it the same size to hopefully clean it up? maybe fill it in with some JB weld and re-tap it to the same size?

any suggestions are appreciated....i should have known better when tightening down on aluminum

thanks!
Matthew