In High School, my friend had a 403 in his '79 T/A. It was a fast car! High top end too. We buried the needle a few times. :) I don't remember the gears in it, but it was a good car.
on a slightly different note, my Grandma had a Buick Lesabre around that year with a 350 in it. They are nice cars. That car could smoke the tires pretty good too... I mean, Not that I'd know or anything! :) Sorry Grandma!
Oh... I would have bought it too!! I like it!