Thanks for the pics thirdgen, my plan was to put a 3/8" ali plate between the manifold and the lid, with the 3/8" plate bolted to the manifold with countersunk allen head bolts, and then the Holley lid bolted to the 3/8" plate. (to save any welding or machining costs). Maybe a thicker 'spacer' plate would work, perhaps an inch thick, or perhaps just easier to buy the Holley base too!
Your first pic with the Holley base does look better from a flow point of view.
|