ON OUR DYNO 12/27/2018 AT THE ZL1 SPEED SHOP, IT MADE 425HP AT 5500RPM AND 494FT LBS TORQUE AT 4500RPM ON PUMP GAS WITH PROFORM 850 DOUBLE PUMPER INTAKE AND HIGH RISE SINGLE PLANE INTAKE. GOOD MOTOR FOR SOMEONE STREET CAR, RACE CAR, OR BOAT. INTAKE, CARB, WATER PUMP AND SPARK PLUG WIRES AND HEADERS NOT INCLUDED.ALUMINUM AMERICAN MADE HEADS, 4-BOLT MAIN, FORGED STEEL CRANK, PUMP GAS FRIENDLY! The one that makes 425hp and 494ft lbs torque with single plane intake and 850 dual feed holley carb. We had two of them.
Its 4-bolt main, roller, cam, high flow aluminium heads with light valves, forged crank, and higher compression for pump gas. Put the stock 350 1970 LT1 back in it and removed this which had 5 speed tremec hooked to it. No junk Chinese aluminum heads or armature assembly. Here is my only problem.ONE IS READY TO GO AND ALREADY DYNOED, CHECKED, AND TUNED. The item "SBC 425HP 494 FT LB DYNO ENGINE (FORGED CRANK / 4-BOLT / ALUM HEADS/ ROLLER CAM)" is in sale since Wednesday, April 8, 2020. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Complete Engines". The seller is "sag_performance_group" and is located in Angola, Indiana. This item can be shipped worldwide.