Quite simply, the 290 HP 350-cubic-inch is the best
small-block crate engine value offered by GMPP! With
290 horsepower and 326 lb.-ft. of torque, it makes a great
replacement engine for countless GM vehicles, while its
all-new construction provides peace of mind over salvage
and rebuilt engines.
The 290 HP is packed with good stuff, too, starting with
the four-bolt-main block, aluminum pistons, and a
hydraulic camshaft. The durable iron cylinder heads
process healthy amounts of air to deliver strong torque
across the rpm range and great mid-range horsepower.
Delivered as a long block assembly, you add items like
an intake manifold, carburetor, ignition system, starter,
balancer and water pump—all available from GMPP. Build
it up to suit your needs, as the economical 290 HP will
leave plenty of change on the table!

• TECH SPECS: 350/290 HP
• Part Number: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12499529
• Engine type: . . . . . . . . . . . . . . . . . . . . . . . Chevy small-block V-8
• Displacement (cu in): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350
• Bore x stroke (in) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.00 x 3.48
• Block: . . . . . . . . . . . . . . . . . . . . cast iron with 4-bolt main caps
• Crankshaft: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . nodular iron
• Connecting rods: . . . . . . . . . . . . . . . . . . . powdered metal steel
• Pistons: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . cast aluminum
• Camshaft type: . . . . . . . . . . . . . . . . . . . . . . hydraulic flat tappet
• Camshaft lift (in): . . . . . . . . . . . . . . . . .450 intake / .460 exhaust
• Camshaft duration (@.050 in) . . . . . 222° intake / 222° exhaust
• Cylinder heads: . . . . . . . . . . . . . . . . . . . . . iron; 76 cc chambers
• Valve size (in): . . . . . . . . . . . . . . . . . . 1.94 intake / 1.50 exhaust
• Compression ratio: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.5:1
• Rocker arms: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . stamped steel
• Rocker arm ratio: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5:1
• Recommended fuel: . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 octane
• Ignition timing: . . . . . . . . . . . . . . . . . . . . . . . . . . . 34° total BTDC
• Maximum rpm: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5100

INSTALLATION NOTES
• Designed to work with the following: intake manifold
P/N 10185063, HEI distributor P/N 93440806 and balancer
P/N 6272221 (not included).
• Use internally balanced flexplate P/N 471529 for automatic
transmission or flywheel P/N 14085720 for manual transmission
(not included).
• Power ratings based on tests with Holley 600-cfm carburetor
P/N 12497147 (not included).
• Intended for 1979-and-earlier pre-emissions street vehicles and
all off-road vehicles.
• Not intended for marine application.
• Comes with black-painted valve covers with perimeter-style
hold downs; see Valve Covers section on page 106 for selection
of chrome, polished and aluminum covers.