This week on Hardcore Tech, we port-match the Holley Hi-Ram intake manifold on our 600 HP, 427 Small Block Ford and test the gains. This engine is based off the 351 Windsor and utilizes a Dart SHP block and AFR 220cc Renegade competition ported cylinder heads. We added the cast aluminum Holley Hi-Ram manifold base and capped that off with a dual 4150 top, and two Holley Track Warrior 650cfm carbs.