Front wheel to rear conversions have normally been classified as an Altered. Check for what makes a Gas coupe. Just because you change something in a production car to make it illegal for production does not mean it's a gas coupe. The entrant needs to meet one of the criteria to meet the gas coupe rules. Remember we don't direct the car you should build, or this would be NASCAR. Was the Saturn you are asking about, 1993 SC2, listed a a Grand Touring or a Sports car from the factory?...2 gives the impression it is for 2 occupants only...Like the Datsun 240Z a kit was available to put 2 small seats in the back. But it's a GT, the 2+2 is a sedan. Find an original brouchure (e-bay-swap meet etc) Do your home work and be ready to prove it beyond a doubt. Johnny Cockran won't be there with you in impounds and that not where you want to find out all your hard work was for not. good luck JD