320HP Magnum Crate w/ X-heads

This is from Jeg's listing for this engine. Also looked up the stock cam specs and it says 196 @ .050" intake / 205 @.050" exhaust.
Note: I think the valve size is wrong on the Jegs site as it says intake valve is 1.78"??? That's smaller than an LA360! Magnum's have a 1.92" intake valve, correct?
The listed bore size is 4.060" too.


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• Horsepower: 320 hp
• Torque: 410 ft.-lbs.

Block Information:

• Seasoned OE Magnum roller block 1993-2001
• Bore/Stroke: 4.060 in, x 3.580 in.
• Displacement: 360 ci

Rotating Assembly:

• Crankshaft: OE cast
• Balance: External
• Rods: OE 6.123 in.
• Compression Ratio: 9.1:1
• Pistons: Hypereutectic
• Rings: Moly

Camshaft Specs:

• Camshaft: Hydraulic roller
• Cam Duration @ .050 in.: OE Magnum grind
• Cam Lift: OE Magnum grind
• Timing Chain: Double roller

Cylinder Head Information:

• Cylinder Heads: OE Magnum cast iron
• Combustion Chamber: 65cc
• Valve Size: 1.78 in. Intake / 1.50 in. Exhaust
• Rocker Arms: Steel 1.6 pedestal rockers

Oil Pan Information:

• Oil Pan: OE front sump
• Oil Pump: Melling standard volume