It sits right in front of the radiator. So whatever is holding the radiator down, dime to donuts it's holding your condenser in place as well. Not sure about GP V6, but it could be a huge plastic piece. There's usually some rubber pads on top and bottom where the condenser sits which is right in front of the radiator. The A/C hoses running in from the compressor and out to the orifice tube will need to be loosened and removed, and the O-rings replaced. Add about an ounce of oil into the new condenser if nothing else is replaced. Don't leave the system open very long. Best bet is to block the hoses removed from the condenser to keep the dessicant from absorbing too much moisture from the air. You didn't say which refrigerant you're using, but it came with mineral oil and R12. If converted to R134a already, you would need PAG or Ester oil, so there's that. Once everything is buttoned back up, evacuate the system and hold a deep vacuum. If it doesn't hold, then don't charge. Make sure it holds a vacuum or you'll be spinning wheels.
BTW, a new condenser would likely be the cross flow type vs. the snaky tube original style. The cross flow type is better. It also mounts thinner, so you may have to cushion the condenser cushions to take up the slack.