Redneck, One thing that caught my attention. Back on reply #10, you said "the back plates open & close when I open the secondaries". That being a vacuum secondary carb, the rear plates should not move with the vehicle sitting still. Please explain in more detail. I can see a gasket under the spacer to manifold, but how about between the carb & spacer? How about some pictures now from a little farther away? Lorne