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In answer to tricky_tran's question above. Our stinger has about 1" from the top of the stinger to the bottom of the hitch ball mount. So, just a bit more than the .75".
I ordered a Reese 7039200 3/4 x 9 draw bar which I'll call close enough to 3/4 x 8.5, it does come with a ball so that might be issue for some people. I like the Reese one-wrench system.