NHRA (IHRA?) stock eliminator - Fees? for 23.47 Weight break ??

Looks like you didn’t comprehend the weight break or go to the bottom of the column on the classification guide.
The 170hp 360 is factored to 250hp, and the weight break is in the upper 15’s.

Auto only for that car, and the index of O/SA is 13.15.
Min weight with driver of 3920.