I've been looking everywhere. So far:
http://www.totse.com/en/media/radio_scanner_frequency_lists/racing.html
Race car freq. list
SCANNING CAR RACES
------------------
Going to the track soon? Take along your scanner and hear exactly what is
going on. Listen to pit crews, drivers, news media, ambulances etc.
Source: Popular Communications
Monitoring Times
Reprinted by: John Johnson KWV8BP
Business radio service frequencies are in heavy use, with some crews using
multi channel radios. It might be a good idea to see what the search/scan
feature of your unit will produce for you if you let it sift through the
following bands:
151.625 to 151.955 462.550 to 462.9125
154.515 to 154.600 463.200 to 464.9875
457.5125 to 457.6125 465.6625 to 467.1875
460.6625 to 460.6875 467.550 to 467.9125
460.9125 to 462.1875 468.200 to 469.9875
Also make sure to check these frequencies:
30.84 457.60
33.14 464.50
33.40 464.55
35.02 467.75
35.04 467.775
42.98 467.80
151.625 467.825
154.57 467.85
154.60 467.875
457.55 467.90
457.575 467.925
http://www.wheelsofspeed.com/ihra-F.html
http://www.ihra.com/
I've got nothing as to specific IHRA frqs. but did see some NHRA frqs.