Jeep 4.0 in 69 Barracuda

This what I have planned for my 70 Duster. But take a crank and rods out of a mid 80's Jeep CJ 258 six and make a stroker. 4.5l is stock bore, .030 over is 4.6l A company called Hesco makes an aluminum head. 300 hp on 91 octane is really easy with the 4.0.