This engine started life as a Mercury Marine 454 Magnum which has the same ports used in the factory LS6 engine.
4-Bolt 454 Block, Steel X-drilled, Nitrated Crank & Rods Shot peened with 7/16 bolts, Forged TRW pistons, Rectangular port heads, Special marine valves & springs.. Cost of New engine was $9,400...
The twin turbo Gentry Kit was the top of the line kit! Twin water cooled turbo's, turbo shield's, Draw through Holley carb, intercooler all water-cooled ports were polished.. Cost of the Gentry twin turbo kit alone was $16,786
On 6psi boost- 675 h/p @ 5250rpm and 660 t/q $26,150 was the cost from Gentry to the customer Above Added: Tue March 19, 2019, 7:09 am PST