Have a 400 with Torker II, Q-Jet and 3/4" spacer..and a 4" air cleaner 67 bird, 400 hood. No problems. RPM is same height as Torker II w/spacer. I did use a phillips bolt in lieu of carb stud/wingnut..looks cleaner in appearance.
Aircleaner is Edelbrock 14" lid/base with Delco element.
Si Vis Pacem Parabellum
1967 Starlight black PMD Engineering 400 Auto 1968 Alpine Blue 400 4 speed 1968 Verdoro Green 400 HO 4 speed 2013 1LE 2SS/RS Inferno Orange Camaro.