From outwards appearances, the '66 and '67 GTO were the same. But beneath the skin, in '67:
* The old 389 c.i. V-8 was replaced with a new 400.
* A new 3-speed automatic replaced the old 2-speed.
* A new 4-barrel carb meant the end of the "tripower" intake of 3-linked 2-barrels. This car has the tripower setup. Harder to tune but more fun.
* I can see that the owner of this car has upgraded the master cylinder. In '66 master cylinders (for brake fluid) were still single-chamber but all cars went to 2-chamber in '67.
* Other interesting options on the greatest muscle car:
** You could order a GTO as either a hardtop like this one, or as a fixed-pillar coupe with full door and window frames. The coupe was less popular, but the stronger body made it a better car.
** If ordered automatic transmission, and you didn't order the optional center console between the front seats, you got a shifter on the steering column. With the console, the shifter was on the floor.
