We have a beautiful Gold hued 1970 Pontiac GTO here in our
Milwaukee showroom. This GTO features a Tan interior and is numbers
matching. In 1970 the GTO retained the Endura urethane cover around
the headlamps and grille. The suspension was upgraded with the
addition of a rear anti-roll bar, essentially the same bar as used
on the Oldsmobile 442 and Buick Gran Sport. The front anti-roll bar
was slightly stiffer. The result was a useful reduction in body
lean in turns and a modest reduction of understeer. The base engine
was unchanged for 1970, but the low-compression economy engine was
deleted and the Ram Air III and Ram Air IV remained available,
although the latter was now a special-order option.A new option was
Pontiac's 455 HO engine (different from the round-port offerings of
the 1971-72 cars), available now that GM had rescinded its earlier
ban on intermediates with engines larger than 400. The 455, a
long-stroke engine also available in the full-size Pontiac line as
well as the Grand Prix, was dubiously rated by Pontiac as only
moderately stronger than the base 350 HP 400 CID and less powerful
than the 366 hp (273 kW) Ram Air III. The Pontiac brochure
indicated the same 455 installed in the Grand Prix model was rated
at 370 horsepower (280 kW). The camshafts used in the Ram Air III
and the GTO 455 HO were the same. For example, the manual
transmission 455 HO's used the same 288/302 duration cam as the Ram
Air III. The 455 was rated at 360 hp (270 kW) at 4,300 rpm. Its
advantage was torque: 500 lb�ft (678 N�m) at 2,700 rpm. A
functional Ram Air scoop was available. Car and Driver tested a
heavily optioned 455, with a four-speed transmission and 3.31 axle
and recorded a quarter mile time of 15.0 seconds with a trap speed
of 96.5 mph (155.3 km/h) . Car Life test car had the
Turbo-Hydramatic 455 with a 3.55 rear differential, clocked 14.76
seconds at 95.94 mph (154.40 km/h), with identical 6.6 second 0-60
mph acceleration. Both were about 3 mph (4.8 km/h) slower than a
Ram Air III 400 four-speed, although considerably less
temperamental: the Ram Air engine idled roughly and was difficult
to drive at low speeds. The smaller displacement engine recorded
less than 9 mpg US (26 L/100 km; 11 mpg imp) of gasoline, compared
to 10 mpg US (24 L/100 km; 12 mpg imp)-11 mpg US (21 L/100 km; 13
mpg imp) for the 455 This vehicle is located in our Milwaukee
showroom. You can view this beautiful 1970 Pontiac GTO in greater
detail including HD pictures and an HD video of it running and
driving at Gatewayclassiccars.com. If you are interested in
purchasing this vehicle or have more questions regarding it please
call us at (262)-891-4253 or email us at
[email protected].
