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 the SoCal summers.  I spent most of my weekend fixing it just so that it can be driven on Monday.  It was finally retired when the odometer hit 50,000 miles.  I added a 'go-fast' racing stripe so must have added 10 horse power.   The top speed was 55 mph downhill.