Even when gas was cheap, they did cars for tightwads. 68-69 Novas came with a 4 cylinder engine and a 375 hp 396 in the same model. All 3 started with economy cars in 60. Corvair, Falcon, Valiant then by 62 GM brought out the whole line of Nova,Cutlass,Tempest,and Buick Special. All with 4-8 cylinder engines. They were offering econ omy at the same time they made monster engines. As for cars getting bigger, I don’t believe they would have gotten bigger than the 76 Fleetwood, Lincoln Town Car, or Imperial.