AMC AMX 390 Go Package

AMC AMX 390 Go Package

The 1970 AMX 390 Go Package represented the final year of the standalone AMX model and the most developed version of AMC's two-seat muscle car. The Go Package bundled together all the performance options that transformed the AMX from a sporty cruiser into a genuine corner-carving muscle car.

The 390 V8 was rated at 325 gross horsepower for 1970, a 10-hp increase over the 1968-69 versions achieved through revised camshaft timing and improved cylinder head flow. The engine produced 420 lb-ft of torque at 3,200 rpm, mated to either a four-speed Hurst-shifted manual or BorgWarner automatic. The Go Package mandated the four-speed manual, heavy-duty cooling, power front disc brakes, Twin-Grip limited-slip differential, heavy-duty springs and shocks, front and rear anti-roll bars, redline tires, and a handling package.

The 1970 AMX received minor styling updates including a revised grille and trim. The overall shape remained essentially unchanged from the original 1968 design — a compact, muscular two-seater with a long hood and stubby tail. The interior was refreshed with new seat materials and door panels.

With the Go Package, the 1970 AMX was a genuinely capable performance car. The stiffer suspension, limited-slip differential, and front disc brakes gave it handling and braking abilities that many contemporary muscle cars lacked. On a winding road, the AMX's short wheelbase and relatively light weight made it more agile than the longer, heavier ponycars from Ford, GM, and Chrysler.

The 1970 model year was the last for the standalone AMX. From 1971, the AMX name became a trim level on the redesigned Javelin. This makes the 1970 AMX the final 'true' two-seat AMX, and the Go Package represents the definitive specification.

Total 1970 AMX production was 4,116 units, of which Go Package-equipped cars represent a significant but not separately documented subset. Today, the 1970 AMX 390 Go Package is among the most collectible AMC products.