78 buick skylark came with 3.8 liter (231 cu-in) V6 rated at 115 hp. The MSRP was $4,999.  The optional AM radio was $82.  The factory AC never really worked so I don't know how I survived SoCal summers.  I spent my weekends fixing it just to keep it on the road.  It was finally retired when the odometer hit 50,000 miles.