Need recommendation for a Carb for better MPG!

Hey, this is fantastic, detailed information that I will definitely be able to use, Thank You!! One thing that has come up lately is that after I drive the Demon, put it in the garage, the garage smells pretty bad of gas so I will have to explore before I drive again. I don't smell it when I drive it. I'm also embarrassed to say that I do not own a timing gun, yet. So, any recommendations will be appreciated. Thanks for the vac gauge info!
Get a timing light with digital advance (for accuracy) is my recommendation. The cheaper dial advance lights can be off by a long ways and ones with no advance don't work to check total advance unless your balancer is marked or has a timing tape. Then there's the issue of the mark being hidden behind a bracket and hard to read. @halifaxhops has lights for sale. Send him a pm.