sockmonkey

I am for the 3rd time replacing my blower motor the first 2 were defective. My problem is with the alignment of the screw holes they don't match up so I can only put in one screw to hold up the motor which it will not do and there is obviously a big gap where I can't screw it into the housing. How in the heck do I fix this so I can have a correct as possible installation? Thanks