Winder aside; the '79 T/A I have now. Not bad for a car that my friend and I built right out of highschool back in '90 (it went back to Texas into storage in his moms garage until just a couple years ago & then I bought it

)
I've been averaging 15 mpg with 3.08s cruising at 70-75
__________________
Two 1975 455 Grandvilles &
'79 455 Trans Am
‘69 Camaro SS 396/375 (owned since ‘88)
‘67 Corvette 427/435
‘23 Lexus LS500 awd
‘20 Audi R8 & ‘25 Toyota RAV4 (wife’s cars)
‘95 Ford F250 4wd 7.3 p-stroke
& countless Jeeps & off road vehicles & motorcycles