Mellvis wrote: Is there a good product to put on them to help them seal to the head, but not glue them on forever?
No, not a "good" product but there is a way that can stop the leak
temporarily. I used a
very thin smear of black RTV applied with a razor blade edge (let it dry) on the side that mates to the head.
WARNING:
Any sealers on intake manifolds will dissolve if hit by gasoline, so if the carbs flood you have leaks again.
Best to replace manifolds if available.
