HI Dennis,
Unfortunately we no longer work on Demon carburetors.
To get a quote on your design simply fill out our online quote/order form and I'll review your program and E you back with a quote on a design for your program. We don't have part numbers and don't offer any off the rack. Everything i custom built for your application. There may be a lot of questions on the tech sheet that you won't know. Just fill it out as best you cna and E it in when you're ready.
Thanks for the inquiry Dennis.
Patrick James
PRO-SYSTEMS