The first 99 of the 150A models had Goodyear brakes, after that they had Clevelands. Which do you have? The brackets and the fairings are different depending on the brakes. If yours has been converted to Clevelands they may require remounting to make the brackets fit, as it is possible to mount them different ways, incompatable with the fairings.
Do you already have the fairings? These are the fat, round fairings, not the pointy ones.
Charles