88958603 GM 350/355 Circle Track Engine Great racing power at a reasonable cost (355 HP at 5250 RPM - Torque 405 @ 3500 RPM) This is a factory sealed crate engine package, complete from intake manifold, stamped steel valve covers with racing style breathers, and 8 quart dual kick-out circle track racing oil pan. The ZZ4 engine is a great value with the 1053 forged steel crankshaft, aluminum heads with 1.94"/1.50" valves, hydraulic roller lifters, HEI distributor, and normal rotation iron water pump included. The base engine is a ZZ4 350ci 355 horsepower, with the following parts: P/N 10105123 4 bolt iron block P/N 14088533 1053 steel crankshaft P/N 10108688 PM rod P/N 10159436 High silicon aluminum piston P/N 10185071 Camshaft with hydraulic roller lifters P/N 12556463 Aluminum head P/N 10185063 Dual plane intake manifold P/N 1104067 HEI distributor P/N 25534354 8 quart circle track oil pan (with oil filter) P/N 25534359 Valve cover kit with breather tube P/N 25534355 Valve cover breather kit P/N 25534352 Special rocker arm nut "kool nut design" Technical Notes: These engines are sealed at the intake manifold, cylinder head, front cover, and oil pan with special twist off bolt heads. The 355 HP @ 5500 RPM was derived from a superflow dyno using a 4 barrel 650 cfm Holley carburetor P/N 80541-1, 32" long by 1 5/8" to a 1 3/4" stepped header with a 3" collector, and 92 octane unleaded gasoline. Oil pan clears most GM rear steer chassis with stock engine location. Oil pan is 7" deep at sump. Shipping to all of the U.S. is available.  We will confirm the cost before finalizing your purchase. Price is good thru 4/30/2008.  (No additional discounts available at this special price.)