Magnum heads on a 74' 318 LA

Have 302 heads on a 318 in a 75 Scamp
Valve pockets cleaned up,188/160 valves, intake ports matched to an Edelbrock performer
KB flat tops and a Lunati Voodoo 401 cam.
Approx 10 to 1 compression 165 lbs cylinder pressure
Engine works like gangbusters even with a 2.76 rear
302,s are cheap if you can find them, Larger valves really wake them up.