79 250 integrated head exhaust manifold crack

[Ziegelsteinfaust]

Not sure. I do know you have to drill holes at the end of the cracks, and open the crack up with a grinder to allow penetration.

Also it depends on how are where the crack is situated.

I "repaired" a Toyota manifold one time with a regular mig welder long enough to trade the truck in. It wasn't so bad, and you can cut a arc welding stick down to help with the job.

Also I heard preheating the manifold or cast metal helps, and keep heat on it as it cools. I used MAP gas.