In my case, after being hot and sitting idle for some time, the car starts right up. It is after driving it a few dozen yards, it sputters and dies. I did come up with one solution which seems to have worked so far although I haven't tried it enough to call it conclusive. Keeping with the KISS principle, this takes no additional parts or basic modifications of the vehicle.

The technique is slightly different whether the vehicle is a left hand drive or right hand drive. For the left hand drive, lift the hood and leave it up during the idle period. If you happen to have a right hand drive, you would want to leave the bonnet up instead.

The hope or thought is, some of the excess heat is allowed to dissipate allowing the carburetor and fuel pump to stay a few degrees cooler. Like I said, I haven't done enough times to make a solid claim, but it can't hurt.