[GURPS Autoduel] Which Basic Set version?
 

As far as I can determine from errata and searches for posts on the fora, the following GURPS Car Wars books are for use with GURPS Basic Set, 2nd ed.:

GURPS Autoduel, first ed.
GURPS Autoduel: Car Warriors
AADA Road Atlases Vol. 1 through 7

while GURPS Autoduel, 2nd edition is for use with GURPS Basic Set, 3rd ed.

Is this correct?

Thanks

Re: [GURPS Autoduel] Which Basic Set version?
 

Yes, that's correct.