If you've got a spare 300,000K then you should buy the Chevy Camaro Z28 '69 then RM it, then fully tune it with LSD and all that you should easily win it with that. Just ram your way to the front but theres not too much holding off to do. Good Luck!
@Kazza, I already have the Buick Special actually and would be willing to get rid of it for something else so sorry.
@Puppy, I tried replying to your latest PM but it said your box was full. I'm good with the trade you proposed though so if you can send me a PM with your PSN name (assuming it's not your user name here) I can actually go ahead and send you the car right now and you can send me your car when get a chance tomorrow.