"Any way you want it!"
Regarding what is "stock equipment"....
I have seen significant differences in EY boats from the 70's thru the 80's in galley fuel, deck gear, and even model and brand of aux. engine.
EY was always ready to option out a new boat to please any given customer.
Different than the high-production builders that would standardize every little piece of gear, down to a price. But they were selling into a different market, too.
By the 80's, EY was installing quite a choice of ranges.... still some of the older-spec pressure alcohol, propane, CNG, and the Origo alcohol ranges. Great choices for the original purchaser, but sometimes puzzling to subsequent owners several decades later.