You can also use Drawing A for designing a rear-engine model but you should take into consideration the fact that there are many difficult techinial problems to be solved in making a practical, full-size rear-engine car. Small, light weight, rear-engine passenger cars have been developed here, and abroad, but the problems met in designing these smaller vehicles are much easier than those encountered in standard-sized cars. The latter include problems of cooling the engine---providing proper access to the engine for servicing---affording sufficient luggage compartment space---and especially the proper distribution of weight, which importantly affect tire wear and safety from the standpoint of roadability.
If you plan to design a rear-engine model allow the minimum passenger space and use the wheel base limits, etc., that are given on "Drawing A." Since rear-engine designs still are highly experimental in the opinion of most designers and engineers, no fixed positions for the various parts of your model are given. You should exercise your own judgment as to what is practical and beautiful using "Drawing A." as your guide.