Ever seen this before?

[Panteracer]

Yes. I was running a similar sheetmetal pressed
impeller on the Pantera that was a ford racing unit
It had a short nose so helped with clearance issues
Broke one then welded the curved portion on another but it failed
also. Both times racing (7000 rpm). Found out many ford gt
guys and kit car cobras were having the same issue
Switched to a flow cooler pump with a cast impeller with no
issues for several years now. Sheetmetal can't take the rpms

Bob