body panels wouldn't transfer, but a lot of the mechanicals would be shared with C ( Electra ) and E body ( Riviera ) cars from 1971-76. there will probably be minor differences between the model years but since you're replacing the doors and quarters together maybe you can blend panels from another year Le Sabre?
if you've got a 455ci, you can get an 8.5" ring gear rear end housing for your car out of a small block Le Sabre.
The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
Government schooling is about "the perfect organization of the hive."
H.H. Goddard, Human Efficiency (1920)