Found this little nugget of info in the GTO descriptions. Rare GTO option..
A rare option on the 1970 GTO was the Vacuum Operated Exhaust (VOE - Option Code W-73) option. The VOE option was an attempt to simplify the old hot rod trick of opening up the exhaust system for more power. With the VOE option, the driver could pull on a knob under the dash and engine vacuum was routed to a diaphragm on each muffler. The diaphragm opened an internal baffle and gave the exhaust an express route through the muffler. The device reduced backpressure (and thus increased power), but it also significantly increased the noise level caused by the exhaust. This option was available only from early November 1969 through January 1970. That was when Pontiac aired a controversial commercial during the Super Bowl that showed off its VOE option. Top GM executives saw the commercial, and immediately cancelled the option, due to the Federal government's increasing restrictions on emissions and noise levels. Only 233 GTO's were built with the VOE option in that short time, which was priced at just $63.19.
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cutting a roof off a four door is NOT a convertible.....
65 Parisienne convertible.one of 49 built for RHD export market,402BBC, T400, 2500 stally, posi rear, upgraded brakes with front discs, FUEL FAST efi custom built by me.
i have a 1968 Pontiac Parisienne 2+2 Convertable...it is a 427 4sp car...i dont have the original eng. and trans for the car...i have a 1973. 454 block crank and heads .. And a borgwarner 5sp........bucket seats and back seats are gone.......i am looking for a truck......2 or 4 wheel.....small car....dirt or street bike....boat.....car is worth around $3000... email me or phone or text 250-462-9193...try your offer... you never know...