History Old AHRA or NHRA Rule Book

Just wondering if anyone would happen to have an old drag racing rule book from the late '60s to very early 70s? I'm curious how smaller engine dragsters would have been classified back in the day. Mostly interested in unblown gas engine classes.

Thanks

Lynn

 

Here you go ‘64, I’ve checked the link still works

https://www.jalopyjournal.com/forum/threads/1964-nhra-drag-rules-in-pdf-format.978471/

 

Scattered years...................