Heat riser re-build on 340 exhaust manifold

[challboy728]

Does anyone have experience re-building the heat riser on a 1970 340 exhaust manifold? Are rebuild kits available? Instructions? Restoring a T/A and want to go back to the factory original setup.

 

[DetMatt1]

This could be helpful.
leaky heat riser - Mopar Exhaust - Mopar Forum