Manifold Repair

I broke the cast manifold on my kubota. Vertical muffler and pipe. Tagged the hoist in the shop as i backed in under it.
I popped it back into place and mig welded it while it was still hot. It held fine until i did the exact same thing again a month later. :BangHead:
So i made a new elbow,and exhaust goes downwards now. Wont happen again.

Think i would v out the crack with a die grinder,heat it up and fill it back in with mig.
Keep it hot and and cool it off slow.
Then true the flanges,as thats likely what cracked it to begin with. I never used gaskets on my power wagon 318. Just a smear of high temp silicone. 15 years plus since i had them off.