AMT 1/25 Classic Peterbilt 377 A/E Tractor Unit kit AMT1337AMT 1 25 Classic Peterbilt 377 A E Tractor AMT1337 AMTs 1 24 scale Peterbilt 377 A E kit is a great project for any experienced big rig modeller whos into the red oval. Add it to your Peterbilt collection today! At 13. 25 inches long, the PETERBILT 377 builds big with a load full of authentic features, including 60+ chrome parts, a Unibilt sleeper with aerodynamic extenders, steerable front axle, Detroit Diesel 60 series 420 horsepower engine,