SPECIFIC MODIFICATIONS INCLUDE THE USE OF PLASTIC HOODS AND GRILLS, PLASTIC WINDOWS, ALUMINUM BUMPERS, PUSHED BACK REAR SEATS, AND OTHERS. ALL MODIFICATIONS ARE DISCUSSED IN RELATION TO THE BASE VEHICLE, A 4-DOOR COMPACT SEDAN. OTHER CONSIDERATIONS, SUCH AS EQUIPMENT STORAGE SPACE AND REAR SEAT HEADROOM, ARE ALSO PRESENTED. ONE OF THE OVERRIDING FACTORS WAS THAT THE FINAL LIFE-CYCLE COST OF THE VEHICLE BE COMPETITIVE WITH CURRENT PRODUCTION MODELS. SEE ALSO NCJ-34193, 34195, 34196, 34166, AND 34168.