How to keep fuel up to the curb after shut off.

todays gas in a carb..will evaporate in a couple days....eddy carbs are great for that since they have a small bowl volume and the accelerator pump well is higher then the bowl floor...the cure is a electric pump....

i drive my 73 duster with a eddy 600 in vegas in summer with no spacer or heat shield under it...starts right back up....but let it set for a couple days....the bowl is dry

and the gas will not drain back down the fuel line...it is not a seal vacuum inside bowl...just like a couple of water sitting in cup...does not drain back