Can someone tell me where did this Holley 1920 come from?

Hi

Actually im trying to bid on this item:

http://cgi.ebay.com/ebaymotors/ws/e...3214845&viewitem=&category=33550#ht_500wt_956

It says "listed for 1964 Dodge 6cyl", im wondering is it for an auto or manual tranny.

And the seller send me this when asked about either the LIST or the 12R number:

Dear malaycooper,

12R2597B, the list number is not evident on this carb, thanks.

- carb_ologist

Cheers