Back to the Charlie Toy body - and probably most other non-factory bodywork:
ON my ZX12 nitrous bike - which has a Toy body - I discovered that body symmetry from side-to-side is very critical. He had to widen the body a bit to get the engine all enclosed, and things ended up with the body a bit wider on the left than on the right. Boyoboy what a "bit" of pull to the left I had. You're welcome to imagine me on the long course at about a buck eighty-five and darned near dragging my right knee (I was that far leaned over to the right) trying to get the thing to run straight. Yee-hah, way too much excitement!!
Whatever body you wear on the bike -- do your best to balance it side to side.
Ad for making the bike really long so you can make the front much smaller -- there are quite a few vehicles that have gone that route. The Poderosa Special of Pappy is a sidecar bike with him laying prone, and even with the sidecar he's well over two hundred. It's not all that skinny - but it shows that skinny does help. I can remember seeing others - just can't remember 'em right now.
PS Yes, it really is spelled "Poderosa" -- there's no "N" in the name. No, I don't remember why he uses that name.