Was looking at installing the Arlen Ness Super Sucker kit on my Softtail and was told that I should also get a needle jet (lowspeed?) out of a Sportster and replace mine. I'm assuming that's because there will be more air coming in creating a lean condition. I like the idea of more air but would like to hear some feedback

 

He must’ve meant Big Sucker. All I could find is that and Monster Sucker kits.
He also replied back with this:
The better filter and pipes make it leaner, but they are also lean for epa. So you end up with a lot of flash deposits behind the valves. Good starting point for an 88 inch is 195 main and 45 slow. I would use the sportster needle and drop the main 30 smaller. The sportster needle is smaller and has a faster ramp so it responds quicker. Gives a better midrange.

Where does one go for the carb needles?

 

I did find a number of jets in a parts box. A larger and smaller unmarked and 3 others...a DJ185, DJ190 and DJ195. Looks like these are new jets that haven't been installed as the packs have not been opened.

 

CV Performance sells the "N65" needle