The Goal: To have a streetable 320hp IH 345 that runs on pump gas, spins to 5500 RPM, and makes torque like an IH SV should! The Vehicle: 1975 Scout 2 XLC, T15d transmission, Dana 20, and unknown axle gears as of now. Currently has a smogged 304. ... Look for flow information on the heads before you go buying parts. If the intake ports won't.