▁other ▁G M ▁inter medi ates ▁were ▁completely ▁rest y led ▁for ▁ 1 9 6 8 ▁with ▁wheel b ases ▁short ened ▁to ▁ ▁for ▁ 2 - door ▁cou pe ▁models ▁and ▁length ened ▁one ▁in ch ▁to ▁ ▁for ▁four - door ▁sed ans ▁and ▁station ▁w ag ons ▁( with ▁the ▁exception ▁of ▁the ▁glass - ro of ▁V ista ▁Cru iser ▁station ▁w agon , ▁which ▁rode ▁on ▁an ▁even ▁longer ▁ ▁wheel base ). ▁The ▁C ut lass ▁Supreme , ▁now ▁the ▁top - line ▁Old s ▁intermediate ▁series , ▁was ▁p ared ▁down ▁to ▁two - ▁and ▁four - door ▁hard top ▁models ▁with ▁the ▁p illa red ▁sed ans ▁and ▁coup es ▁dropped ▁and ▁the ▁convert ible ▁moved ▁to ▁the ▁lower - pr iced ▁C ut lass ▁" S " ▁line , ▁upon ▁which ▁the ▁ 4 - 4 - 2 ▁mus cle ▁car ▁was ▁now ▁based . ▁Also ▁the ▁standard ▁Ro cket ▁V 8 ▁was ▁en larg ed ▁from ▁ 3 3 0 ▁to ▁ 3 5 0 ▁cub ic ▁inches ▁with ▁. ▁ ▁The ▁ 1 9 6 9 ▁models ▁received ▁only ▁a ▁minor ▁fac el ift ▁such ▁as ▁a ▁new ▁split ▁gr ille ▁and ▁vertical ▁ta ill ights ▁with ▁the ▁same ▁model ▁and ▁engine ▁offer ings . ▁A ▁new ▁three - speed ▁Tur bo ▁H yd ra - m atic ▁ 3 5 0 ▁was ▁added ▁to ▁the ▁option ▁list ▁to ▁replace ▁the ▁two - speed ▁J eta way ▁automatic . ▁Head