I believe it is 2" taller then the Performer or factory intake. The only stock looking air cleaner that might fit, if it clears accessories, is the reproduction Camaro 1" drop base dual snorkel air cleaner. A stock 307 air cleaner was not even close to fitting on my 88. Another nice thing about my 70S, since it was designed to fit the BBO, even the Victor will fit under the hood with the SBO. My 307 air cleaner turned into a dual snorkel easily fit, I am considering a 1" open spacer and may try that on the 424. Unfortunately trial and error, due to body and motor mount condition will be necessary to see how well it fits. It is a nice sweeping intake, some say Performer for mild builds with back to back track times to prove it. Others have gained at the track with Vin 9 307's, so a can of worms indeed. What are your 350's specs?