Add 273's, 340's & 360's to the "318 Race" ?

Here is the penalty box used in the 318 race. scroll up to line 2 to see the Base car
Penalty box 318 -2.xlsx - Microsoft Excel Online
Nice work on the spreadsheet! It would give me a headache trying to put my car into that handicap deal though.
I do think I will take mine to a local track this summer and run it a few times just to see what a 273/999/3.73:1SG 4V GVOD 28" tires will run.