Nearly denied for the purchase of a camshaft on my 'pre smog' California vehicle

This is new to me.....
Me; "Hello Summit, one CompCams XE262 camshaft please"
Summit; "Is this item for a vehicle mfg. before 1966 or a kit vehicle?"
Me; "Huh? Neither, it's for a 1974 vehicle, pre Calif. smog"
Summit; "This item has been removed from the Calif. air resources...." blah blah blah....
Me; "What does that mean?"
Summit; "It means I can't sell it to you"
Me; "...um..my mistake, it is for a pre 1966 vehicle"
Summit; "Ok, we have it in stock, you should receive that in 1-2 days. Thank You"