Former Jr. thinking about making the jump to Class Racing

[silent.echo]

I was looking at IHRA's Rule Book, which states

Fifty-six classes reserved for American factory-production automobiles and some foreign and domestic sports cars. Classified per IHRA performance rating as listed in the Official IHRA Stock Car Classification Guide. Only those cars listed in the Guide are eligible for competition. All cars in stock classes must be factory-production assembled, showroom available and in the hands of the general public. AF through HF class cars are limited to 1978 or newer.

So...where does IHRA keep their "acceptable combonations list" on the web or do they at all?