As much as it pains Sum and the rest of us, read it again Willie (just section 7.I). Sidecar is a stand-alone class. It is not part of A, M or P, it is wide open. Just read the 2 sidecar pages, it even addresses sidecar streamliner. You can make Sheri's bike a fully (almost) streamlined outfit, just allowing unrestricted exit if you choose.
Sum, Kid was .977 and for info, I encouraged him to run it again, there was time, told him we could find a larger drive sprocket to get him off the limiter, he said he had already far exceeded his goal and was done for the year...