Just search for "OCC Chopper" and there will be a plethora of threads on that bike. Some members have photos showing how they did it, maybe that will help.
You just send him your stock one and he will modify it to fit the occ stingray bike. People say there is a problem mounting the sprocket to the rear hub but for me it was simple. Just drill through the hub and bolt it on, its that easy. You also have to get a longer chain. hope this is helpful.
Livefastmotors makes a mount that doesn't require drilling holes in the frame. I have the Barry's mount and if I had it to do over again I would have used the livefastmotors mount or made one like it.
hmm,all I saw at LFM was a occ kit for $185 had a mount,sprocket adapter and tail pipe.seemed kinda steep to me.I just ordered a chopper bike motor mount from BGF on e bay for $35.hope its worth a crap i havent got it yet