▁Ford ▁R anch ero ▁and ▁Country ▁Sed an ▁station ▁w agon . ▁Of ▁course , ▁early ▁Che vy ▁cars ▁were ▁banks , ▁so ▁a ▁detailed ▁interior ▁was ▁not ▁offered . ▁On ▁the ▁bank ▁models , ▁a ▁coin ▁trap ▁was ▁made ▁in ▁the ▁ch ass is ▁so ▁money ▁could ▁be ▁removed . ▁ ▁Ch ass is ▁detail ▁varied ▁quite ▁a ▁bit ▁in ▁different ▁models . ▁Though ▁more ▁to y - like ▁in ▁execution , ▁early ▁International ▁pick ups ▁had ▁detailed ▁pl astic ▁bases ▁with ▁engine , ▁exhaust ▁and ▁susp ension ▁details ▁clearly ▁m old ed . ▁Starting ▁about ▁ 1 9 5 4 , ▁though , ▁most ▁bases / ch ass is ▁were ▁made ▁of ▁metal , ▁which ▁apparently ▁added ▁struct ural ▁strength ▁for ▁fr iction ▁mot ors ▁that ▁started ▁to ▁be ▁popular ▁in ▁many ▁promotion als . ▁For ▁example , ▁the ▁ 1 9 5 5 ▁Bel ▁Air ▁without ▁fr iction ▁motor ▁had ▁a ▁ch ass is ▁completely ▁smooth ▁and ▁m old ed ▁in ▁pl astic , ▁while ▁the ▁ 1 9 5 4 ▁Cor v ette , ▁with ▁" sp in - tor que ▁motor " ▁( as ▁PM C ▁called ▁it ), ▁had ▁a ▁metal ▁base . ▁Though ▁PM C ▁offered ▁no ▁promotion als ▁after ▁ 1 9 6 0 , ▁other ▁prom ot ional ▁model ▁mak ers ▁found ▁the ▁new ▁and ▁harder ▁sty rene ▁pl astic ▁dur able ▁enough ▁to ▁support ▁the ▁motor . ▁Also , ▁pl astic ▁bases ▁did ▁not ▁rust ▁over ▁time . ▁ ▁PM C ▁Che v