The interstate throttle housing exits at the bottom, not the front.
I do not know if they work on standards and tourers, but I think they do.
Not sure if #5 is the part you need, if usable.
http://www.procaliber.com/oemparts/a/hon/506c2f6df870023420a31b4c/switch-cableIf the levers you bought say they fit Valkyrie, and they don't, I'd try to return them for refund, even if they have tool marks, and replace with a set of adjustable for 1800GL, which only need a small piece cut off.
http://forums.delphiforums.com/valkyrie/messages/?msg=13360.1http://wingstuff.com/products/36601-adjustable-wide-brake-clutch-levers-for-gl1800Or Kuryakyn adjustables for GL 1800
Or Kuryakyn wide chrome non adjustable for Valkyrie. (reach shorter than stock, and great)