I hate long needles although os is better then most, I was doing some camparisons in the ​​​​​speed line and it should apply to other similar carbs. From the parts list all you need to change to go from from a long needle to a short needle is 22082340 short needle instead of the 23818340 long needle. The spray bars/mid have the same part number. So you shouldn't have an issue with it seating and can tune old school style as long as the high speed had enough range.