13 car fields in pro stock, and 25 cars trying to get into the pro-mod field.

The rules changes pushed teams away as far as I can see.

Pro mods get their own 1/2hr show...... Pro stock gets about 1 minute of air time during the qualifying show.
I don't think you're going to have much luck hunting down sponsorship with that kind of air time.

Top fuel Harley's get more love from fs1.