Shady Dell Speed Shop 428" Engine on the dyno. 4.125" bore R3 48 degree race block, 4.0" stroke, INDY 360-1 245 CNC heads, 2.125"/1.60" valves, SDSS 272/275 @ .050" Solid Roller camshaft, 11.6:1 compression, pump gas, INDY 360-3R intake, 950 Holley ultra HP Carb. 712 HP @ 7000 RPM, 603 FT LBS TQ @ 5500 RPM.