Well on my 67 with the 390 and later the 427, it all fit under the hood. 390 and 427 with the MR427 intake, Holley carb and 289 Hi-po aircleaner with about a 2-1/2" tall filter. Later had the Low riser dual 4's with Holley 600's and the factory cast aluminum aircleaner and 2" filter. Only when I decided to stack 2 filters on that did I cut the hood.