May I suggest you to go to the Dwight Southerland website (classracerinfo). (
http://classracerinfo.com)
You will find what you need, it's a well built, great up to date tool.
You will have to register and it's free.
Once open, choose your actual set-up. Then, in order to open the engine specs you just have to click on one of those " factor case" anyone...This will give you classes for your choice set-up. Go down this window and go to the GT classes button and you will have your answer.
Example: Chevrolet 56 with 2022 Chevrolet 350 /630 supercharged engine will give a FGT/AA to FGT/N set-up.
Sorry for this long explanation...