Here's a decent article that gives a little more insight. Sounds like Bruce Kahlhamer has done a little homework and applied creative solutions to longtime handicaps. Using the needle and seat to set the overall fuel demand to your motor and fine tuning with external detented adjusters is total KISS. I'm envisioning adjusting this carb like your shocks. Take good notes and you should be able to quickly adjust fuel curves for different tracks, conditions, and desires.
http://www.chevyhardcore.com/feature...es=og.comments