Car - 1968 Opel GT - 1968 Dodge Dart Hemi Super Stock.
Race - Half-Pipe Speedway
Fast Travel to this race on the left side of the map and create a blueprint and just change the laps from 2 to 1. It may say that the car isn't geared towards races on hot wheels island and ask if u want to auto upgrade. You can do so before hand if u want as well. After u create the blueprint for 1 lap all you have to do is complete the race, winning isn't necessary but who likes losing lol.
If your going to leave a downvote please leave a comment.