The rumors is Billy has been screwing people.Doing bad work that Mike Janis has been taking in to straighten out.
Mike Janis Racing Inc
It's too bad that Billy which is a good car chief machinist is ruining Jim's rep which took yrs to establish.Guess Billy isn't a good business man.
The link is useful to the O/P's question to build a blower motor.
I brought up the lease idea because I am not sure of the O/P's abilities to tune a engine at that level.