How do I go about checking the codes ?? The car is being sold through a used car dealer. I'm sure there not to up on the details on this car. I had the exact same thought that it's most likely a 389, but most proberly with a 421 air intake. Does that make sense?by Eric F - Pontiac GTO Forum
I know the 421 v-8 is not original to the car, I would like opinions on the motor in general. I'm not a gear head, and have never really heard of the 421 motor before reading about it on this site today. The car has bucket seats, power steering and brakes, an AM radio, and It has a 400 B & M automatic trans. The car looks to be in great shape, and is in my price range. The car willby Eric F - Pontiac GTO Forum
I'm looking at buying a 66 GTO w/ a 421 v-8. The car looks very nice, but can you give me some opinions on the motor? In general, is this a good motor, year for the GTO's? I love the design, I was looking for a good 67', but this 66 really caught my eye. TIA - The Bigest E from Chicago.by Eric F - Pontiac GTO Forum