I've been struggling with a small problem and thought I would turn to the F-Chat brain trust for help. A couple of years ago I did a full engine out service on my 1977 308 GTB which included re-built heads, re-built carbs, belts, hoses, etc. It was a very comprehensive service and an opportunity to verify the health of everything. Once the car was put back together I got the carbs nicely set up and used O2 sensors in the exhaust to get the carburetion perfect. Once started the car runs flawlessly. It idles perfect and has zero flat spots during acceleration right to redline. Temperatures and pressures are all good and the compression and leak down numbers are super strong. Ignition cap and rotor (single distributor) are in excellent shape and the spark plugs (NGK BPR7EIX) are new and have been again recently replaced. From a mechanical perspective I can't point to any system that is not operating correctly. Now for my problem, if the car sits for any more than a couple of days, it is difficult to start and floods easily. My starting procedure is as follows: 1. Choke is never used and never has been 2. Turn the key until the fuel pump runs 3. Wait at least 10 seconds for the floats to fill and for the fuel pump sound to change (historically a sign the floats are full) 4. Press the accelerator once to prime the engine via the accelerator pumps (I also tried no presses and 2 presses with no difference) 5. Crank the engine until it catches (often requiring multiple long cranks) 6. When it catches carefully feather the throttle for the initial ignition to take hold. This is a delicate balancing act but once the engine starts and is given a rev or two to 'clear its throat' then everything is fine. Often times the engine will die while trying to get it to stabilize so another crank of the starter is needed. The problem is that if you don't get this just right it goes down a path of the engine flooding which requires time to sort out. Engine temperature does not matter as the car will start perfectly after 1 day but not after 2 or more. The question is what is it about the car sitting for several days compared to 24 hours that would cause a major difference in how easily it starts? Any help or ideas would be appreciated.