To my knowlege trac arms don't come with slots for spools.
I think you have to tell them you want slots welded on to the arm to fit your spools....if in fact they even do that.
My advice: either weld on some slots for spools yourself (or your local shop) or get the pitbull stand that doesn't use spools, but lifts from the swingarm itself. (The pitbull stand I have actually is reversible...can lift from spools, or can lift from the swingarm depending on how you hook it up).
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