high temp powder coating???????

Good to know, what does an iron manifold get to? I have a crack in a L6 aluminum intake and want to use a low temp (600-800) muggy weld type filler in there. Its right where it counts, in the choke stove/intake floor right above the cast iron exhaust. Nothing really wild, maybe a minute or 2 at full spool at 9psi. Bear in mind that it gets cooled on one side from the intake charge and heated on the other from the exhaust.