This is kind of a long shot, but I figured I'd give it a whirl...
I ordered a set of velocity stacks for my CB750 ('75 K model) a while back (winter time, not sure if I have the packing slip anymore). However, I ran into issues with the guy who was building my frame and ended up ditching the project. Along the way I picked up a '79 XS650 which is now my current project bike.
Looked back through my paypal account I made a payment on January 11th, 2013 for $[edit] to you with transaction ID# [edit].
I would love some velocity stacks for my XS, which has the BS38 carbs on it. Unfortuneately the CB750 velocity stacks aren't even close to the same size as the carbs on my bike now. They are a machined, old school flare set of stacks. I have removed one stack from the bubble wrap in order to place it on the CB750 carbs and see how cool they look. I never even tightened down the set screw.
Can I do some form of exchange for a set for my XS? I understand if the answer is no, but I figured I would ask. I'd want the same style (machined, old school flare), just made to fit the BS38 carbs on the XS.