Buick Electra 225 Limited
Only a minor facelift with revised grille and taillight trim marked the 1970 Electra 225. The big news was under the hood, where a new 370-horsepower 455 cubic-inch V8 replaced the 430 V8 used from 1967 to 1969. This was the final year for the Electra convertible, finned aluminum brake drums and high compression engines. New this year was a concealed radio antenna, which amounted to two wires embedded in the windshield.
New for 1970 was the Estate Wagon, which shared the Electra's 455 V8 and four VentiPorts, but was a B-body car like the LeSabre and the Wildcat and consequently shared the smaller cars' 124.0-inch (3,150 mm) wheelbase and interior. This was Buick's first full-sized station wagon since 1964. The following year the Buick Estate would move up to Electra's larger body and more voluminous interior.
Source: Wikipedia, 2012