I have purchased everything I need to convert my SE to a sidedraft Dellorto, including the carb itself. (well, I will tomorrow)

The carb I am buying is tuned for a 4 port, streetport 13b. Jets and tuning specifics are unknown at this point. How different are the fueling requirements as compared to my 6 port, stockport S3 13b? I have a header and full-straight-through exhaust, but that's it. Stock ignition. I'm not dependent on the car for a daily driver as I have a Mazda2 now, but I'd like to get the car running well.

I have a friend with a wideband 02 sensor he would let me borrow, I just need a controller and gauge.

 

it actually should be fairly close. it does depend on a few things like what mixture and fuel pressure they tuned too.

you probably should get the wideband up and running and try a few different mixtures and see what your car wants/likes. it should be happiest between 12.5:1 and 13.2:1, it might run harder leaner, but you should leave it a little rich so it has some margin.