Howdy all!

I'm looking to use a chainsaw at our haunt. however, a saw with the chain removed is not an option my employers want to pursue do to safety issues that surround the use (heat, fumes, possibility of hair getting caught should a actor get too close, etc.). That being the case, I'm looking to build a chainsaw using an real chainsaw body, but remove the motor and replace with speakers and the proper electronics to create one that nearly as loud as the original. I don't wish to buy the garbage toys that are sold and try to pass it off as a real saw. Anyone have some ideas on how to create this unit where it's self contained and bloody loud?