https://www.muggyweld.com/videos/pot-metal-repair/

There are some videos of repairs. One example shows a crack repair but the finish has been affected.
Also look at causes of the crack. Is something moving or vibrating causing the crack in the first place?
You may fix the crack only to have it crack again. Pot metal is not flexible.


"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."