TR3 Engine Stutter

["Jerry Goulet" <jgoulet@thomsontechnology.com>]

For the first ten minutes or so that the engine runs it will stutter or even 
die when revved.  If the throttle is applied slowly then it accelerates 
smoothly. This problem  clears up after the engine is fully up to temperature.  
What are the usual suspects in this case ?  Fuel restriction ?  Timing Advance 
?  Vacuum Leak ?
Cheerio
Jerry Goulet
1960 TR3A