TECH SPECS: Ram Jet 350 Part Number 12499120
Engine type Chevy small-block V-8
Displacement (cu in) 350
Bore x stroke (in) 4.00 x 3.48
Block cast iron with 2-bolt main caps
Crankshaft cast iron
Connecting rods powdered metal steel
Pistons high-silicon aluminum with offset pins
Camshaft type hydraulic roller
Camshaft lift (in) .431 intake / .451 exhaust
Camshaft duration (@0.050-in) 196° intake / 206° exhaust
Cylinder heads iron; 64cc chambers
Valve size (in) 1.94 intake / 1.50 exhaust
Compression ratio 9.4:1
Rocker arms aluminum roller style
Rocker arm ratio 1.5:1
Recommended fuel 92 octane
Ignition timing 10 degrees BTDC @ 700 rpm
Maximum rpm 5500

350 horses from GMPP's modern "fuelie". From the late-1950s through the mid-1960s, GM offered the Ram Jet fuel injection system in a variety of models. The Ram Jet 350 evokes the nostalgic look of the early fuel injection system, with a styled intake plenum�but that's where the similarities end. Instead of a mechanical injection system, the Ram Jet 350 is fed by a state-of-the-art, electronically controlled port fuel injection system.

Developed by GM to the same standards as production vehicle systems, the Ram Jet 350 delivers exceptional throttle response and performance�all enabled by the sophisticated, latest-generation MEFI 4 controller, which has improved electronics and closed loop capability (compared with the previous MEFI 3 system) for great all-around drivability.

A tried-and-true 350-cubic-inch small-block combination anchors the Ram Jet 350. It is designed for long-lasting durability and pump-gas compatibility, with iron Vortec cylinder heads, a hydraulic roller camshaft and 9.4:1 compression.

GMPP delivers the engine with the necessary wiring harness and detailed instructions. It can be installed on any 1979-or-earlier vehicle originally equipped with a carburetor