Fitment and Product Information. Cylinder Head, PowerPort® 175, Street Port, Assy, 70cc Chambers, 1.55 in. Springs, Ford 390, 406, 427, 428, Each. Brandname: Trick Flow Part Number: TFS-56417002-C00 Product Details. Trick Flow is at it again, Ford fans! This time Trick Flow is serving up a heaping helping of horsepower for the legendary Ford FE. Presenting the PowerPort® 175 cylinder headsspecially designed and engineered to deliver more go for 390-428 engines! The heads are a direct bolt-on for all 1961-76 engines. Theyre made from top-quality A356-T61 aluminum so theyre much lighter but still as strong as ORG. The intake runners have been optimized to increase flow velocity, and Trick Flows…