hi will a 72 4 door cutlass frame fit on a 71 2 door cutlass? thanks

 

Nope. On the 68-72 A-body cars, 2 doors used a 112" wheelbase, 4 doors and wagons used a 116" wheelbase, and Vista Cruisers (and 68-69 Buick Sport Wagons) used a 121" wheelbase. (and just for completeness, the 69-72 Grand Prix and 70-72 Monte Carlo used unique frames with a 115" wheelbase)

 

thanks for your very helpful info this site is great