Where spoiles default on W30s

If you ordered a 1970 442 with the W30 package, did that include the rear spoiler (W35) option by default or was still something that had to be ordered. I assume you could have always had it removed as well if it did come defaulted.

Looks like it was optional

Both the Sports Coupe and Holiday coupe had the sleekest roofline of any 1970 GM A-body – it was a semi-fastback design that gave the W-30 442 a sleek look especially when equipped with the optional rear wing spoiler.

Source: http://oldcarmemories.com/1970-oldsmobile-442-w-30-it-would-never-be-this-good-again/