This site might give you some good info.

http://members.aol.com/dvandrews/dellorto.htm

He's also have done one simple dos-based jetting program which is quite useful.

http://members.aol.com/dvandrews/

You probably have 32mm venturis on your carbs as they are default ones, but check them out. With those I have used 135 main, 7772.5 emulsions and 210 air jets, and 7850.1 idle airs with 55 idle jets. But that's just one configuration which works quite reasonable with my little modified L18, jetting carbs is always for one engine only and you should have full sets jets and emulsions to try out which configuration works better. And it's almost imbossible to find out the best configuration, you can always prefer better driveability or better fuel consumption and even moons position has effect to best jetting, but jetting is quite fun if you have right attitude.

help help. has anyone had any experience with delortoes. I have come by a pair of 40mm sidedrafts but I am going to need choke and jet sizes and emultion tubes. Can anyone help me they'l be on an A15 with a bit more compression but standard other wise