Man I thought I had this 3x2 Carb setup down. Now I got 3 new old Holley 94 model 11/99 carbs with a chandler and groves center Carb. I tore them down to inspect the insides and clean them up. Used two block off's for the secondary carbs. Now that they are close enough in ventury size it should work. I'm running a progressive linkage and that should work well for in town driving and if I need to get on it after half throttle the secondarys will kick in. Check out the progress, I'll post later.