I'm a little confused here. The op asked about a promo "kit". Now, I know he is young from another post and may be confused and the answers I see are even more confusing. A promo and a promo kit are two different things. As I see it, a promo is as described by most posts here, but a promo kit is different. A kit is assembled by the modeler. A promo is already assembled. Many Craftsman kits were a snaptite issued to entice young builders. Such kits as this 1964 Comet are an example. The excel kits of the 1955-56 Pontiac and 1956 Plymouth's are also examples. Although kit manufactures issued versions of their promos in the late 50's etc, the kit version and promo version may have differences. I have a 1959 promo Olds 98. I also have a kit version of the same car. The dashboards are different for one example. The Modelhaus will inform you that you need to specify if you are looking for a kit part from them as their parts are many times based on the promo version and therefore, different. A reference to what kit or promo the op was referencing would would be more helpful. Otherwise, the question is still unanswered.