That would be very hard to do. You'd have to build a new housing and who knows if the turbine is built right to be able to do that. I'd imagine the actual loader turbines are alot stronger since they get the abuse of getting beat with leaves/sticks whatever else.
By the time you get done ruining a 11hp blower and spending all the money to try and fab up a new housing you'd be better off buying a new or used loader.
No - the fab work isn't that hard at all. I've looked into it and plan to do it this winter when things slow up. I believe the impellers are exactly the same as the blowers. I'm gonna convert an 11hp billy goat to a truck loader.
I'm pretty good when it comes to fabrication, but how do you presume to make a new housing?
Unless its just a quick fabricated (when i say fabricated I mean a front and rear plate and then strips of metal bent around and welded so it would have a square inlet and outlet) unit? I'm interested to hear this. That quick fab'd way is the only way i can think of it, kind of hard to shape metal from the Round Inlet formed to the square body of the impeller housing without some form of press.
If you go here you can download the parts manuals on the blower and truck loader just to get a idea of the difference between the two fans.
IMO, I don't believe a blower fan will hold up. http://www.littlewonder.com/
It is actually pretty easy, I have done it with a giant vac. unbolt to motor from the housing, spin the housing so the blower exhause points stright up. Buy the intake hose and converter to replace the intake cover over the impeller. Fabricate a tube to load the leafs and you are set.