These are also an option. Look nice in the photos, but I have not seen them upclose.
http://www.b-n-lresins.com/shoppingopencart/Aftermarket-resin-cast-1-24-1-25-scale-model-engines-Ford-Diesel-Mopar-Oldsmobile-Toyota-Honda/Aftermarket-resin-cast-1-24-1-25-scale-hobby-model-Mopar-engine-Dodge-Chrysler-HEMI-Plymouth-Jeep