When switching from a 10-71 to a 1471 HH blower I was told by manufacture I need a set back plate. This plate moves blower way back over distributor. I had to cut a large portion of the plate out to clear the distributor cap and wires as well as extend belt guard tensioner forward as well as with the extra height the blower belt barely fits. Cap and rotor are extremely close to underside of blower and blower must be removed to check rotor phasing and such. My question is this set back a good thing or just something to sell a $100.00 piece of aluminum? Thanks in advance.