Is this right ?!?! 4" cast crank

Treblig said

Chuck it up between two centers, a dial indicator and a little heat in the right spots...VIOLA!!.... straight shaft!! Some guys are really good at it. Might have to go .010 under to clean up??? I had a close friend who used to weld up the rod throws to make his own stroker cranks. He drove a funny car and was FAST!!!

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You know, I've seen that done! probably 30 yrs ago... I was horrified when I saw him wail on it with a huge copper drift and a sledge hammer.
And just as you said, they turned it down to get the rest out of it.
The machine shop owner said, 'yeah, people aren't used to seeing that..' , ' major crank Mfg's do it all the time'