It's the annual (American Graffiti) 'salute' held in Pentaluma, Ca. A celebration held in honor of the film's history in the town. This year it wil begin on May 17 and go through the 20th.
Also; a "rear end" ratio of 3:90 to 1 is a low ratio and the 3:50 +/- will be 'higher' etc. A 'lower' one causes the engine to revolve more to go the same distance/more fuel to be consumed.
If you go the Salute get me an XL T-shirt & a Large one. Save the receipt & I'll pay ya back.
Happy trails.
