[Rev]

I had one for awhile. Mine came with #66 jets primary and I think the secondary plate orifices were also #66. Fooled around alot with it and gained some performance by trial and error. The great thing about Holleys and Demons is that all the tuning parts are available at O'Reilly's or other auto supply outlets and even open Sundays. Get the Holley red book and maybe another one on tuning Holleys. That's my advice anyway.

Rev