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Alan Roehrich · 12-09-2013, 08:49 AM

For GT, the car itself used to be assigned it's highest/heaviest shipping weight. That is the shipping weight you had to use, regardless of what engine you used. So, if you were to swap an LS1 into a car that was originally available with an all iron big block, the natural class of the car would have been calculated from the shipping weight with the all cast iron big block, and the GT factored HP of the engine. They may have changed that rule.

12-09-2013, 08:49 AM	#4
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,118 Likes: 1,578 Liked 1,837 Times in 417 Posts	Re: Super Stock GT For GT, the car itself used to be assigned it's highest/heaviest shipping weight. That is the shipping weight you had to use, regardless of what engine you used. So, if you were to swap an LS1 into a car that was originally available with an all iron big block, the natural class of the car would have been calculated from the shipping weight with the all cast iron big block, and the GT factored HP of the engine. They may have changed that rule. __________________ Alan Roehrich 212A G/S Last edited by Alan Roehrich; 12-09-2013 at 08:51 AM.