40’s. Engines can be painted to look OEM stock or detailed with chrome/polished aluminum for a Pro-street/race look.

Why was Hemi banned from NASCAR?

According to various sources, Hemi was banned « not for technical reasons, but Because it’s not readily available in a car from a Dodge or Plymouth assembly line‘Easy’ is the key concept. The gist of the argument is that this option is too costly for the average buyer.