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1st Gen Ram Tech'93 & older Rams: This section is for TECHNICAL discussions only, that involve 1993 Rams and older. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
Where exactly is the line located? If it's by the TBI across the intake manifold, it will be safe. If it's by the exhast manifold then you should use steel.
I just re-read you're original post. It sounds to me like you're talking about the line across the intake manifold next to the valve cover, if I'm not mistaken. Heat should not be an issue in that area.
its just a crack? i would probably just drop some JB weld on it. maybe even take a little piece of steel and put that on top of the glue with a hose clamp holding it all together.