The 1980 Grand Am and Grand Prix SJ both saw improvements to there suspensions and drivetrains that made them drive better than the 78-79 versions. The non California versions adopted the Trans AMs std drivetrain consisting of W72 170 HP 301 4bbl V8 and 2.93:1 axle ratio tied to the THM 350 3 speed automatic with firm shifting valve body settings. These cars also had dual exhaust and std bucket seats with floor shifter, guages, 205/70R14 tires, F41 suspension with rear sway bar and the Grand Am has std rallye wheels. In comparsion the 78 Grand AM had a 140 HP 301 2bbl tied to a 200 metric 3 speed automatic, a bench seat, hubcaps and F41 suspension as std equipment(buckets and rallye wheels were optional). The 79 Grand Am had a 231 V6 std with 3 speed manual trans along with a bench seat and hubcaps as std. The Grand Prix SJ for 78-79 had a 301 4bbl with 150 HP, 200 metric 3 speed automatic(4 speed manual was a 79 option on 301 4bbl cars), 2.41:1 axle ratio, vinyl bucket seats and wheel covers. These were all pretty neat cars but the 1980 versions were the best equipped, fastest and best handling of the Grand Am/GP SJ series and the dual exhaust looked neat. What would really have been cool was if Pontiac had installed there new for 1980 turbo 301 in these cars as an option. There were plans to do so but 1980 was a bad year for the auto industry with the 2nd fuel crunch, production capacity was limited initially on this new engine and re-certification was expensive and the G-body car program was thought to be dead and gone by 1983 when front drive cars like the Ciera/6000/ Century etc were going to take over as GM's bread and butter mid sizers.
It's funny that oil crunches have screwed up so many plans like this in the past and here we are today with rediculous oil prices once again causing automakers to rethink the V8 engine, put Zeta on hold and cancel big powerful rear drive vehicles such as the Impala for 2010. Like the saying goes "the more things change the more it stays the same". What comes around goes around.