73 Duster

And even if you're considered the 318 and buying a nother one obviously buying a 360 would be better for horsepower reasons obviously. Also something to take into a strong consideration is the readily available Magnum block that is in every Pick-n-Pull.. that 727 can be rebuilt for about $120 for a rebuild kit... I felt rebuilding a Mopar automatic was easier than falling out of my bed... And that was as a first-timer...
not discouraging from the Ford stuff but just saying that this route in my opinion would be one hell of a lot easier...