malb is 193"
cutlass is 199"(83 up) with that just being the difference of the malbu flat grill and tail over the cutlass angled grill and angled tail lights..
malbu 3362 lb (5.0v8 auto)
cutlass 3397lb 5.0v8 auto)
at 30 lb's difference, I'd call that moot..
as the 83 up cutlass areo is better..
and fyi the 78-81 cutlass is the same length and weight as the 78-81 2 door malbu..