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here's some info on a Mopar 549, but this block would have never been in a dump truck:
MOPAR 540 ALUMINUM HEMI CRATE ENGINE—650+ HORSEPOWER
Mopar’s 540 cid Aluminum Hemi Carbureted Hemi Crate Engine is designed for professional street cars or for anyone who wants the horsepower and durability of a race engine with the drivability of a street engine. This Hemi is a fully water-jacketed motor with a street compatible camshaft. Its aluminum block is stronger and lighter than cast iron. Also available in a completely polished version for the extreme show car enthusiast!
Specifications:
• All-new components
• Aluminum block with steel sleeves and cross-bolted mains
• 4.500" bore
• Aluminum cylinder heads and valve covers
• 4340 H-beam connecting rods
• 2.25" intake and 1.94" exhaust stainless steel valves
• High-performance, double-spring valve springs
• Hydraulic performance roller camshaft, degreed for maximum horsepower
• Lightweight forged racing pistons with chrome-moly performance rings
• 10.75:1 compression ratio
• Hydraulic performance roller lifters
• Raised cam location for more rod clearance
• Roller tip high-performance intake and exhaust rockers
• Forged 4340 nitrided stroker crankshaft (4.250” stroke)
• 8-quarter alum. oil pan with billet alum. high-volume & high-pressure external oil pump
• Aluminum water pump and housing
Extras include:
• 1/2" head studs
• 9/16" main studs
• 1/2" side bolts on mains
• Complete performance gear drive
• Racing push rods
• Heavy-duty performance engine bearings
• SFI-approved racing vibration damper
• Precision-balanced engine assembly
• Performance gaskets
• 1" diameter oil pump feed line
• Billet aluminum rocker stands
• Hardened performance rocker shafts
• Chrome-moly performance spring retainers
• Hardened valve spring keepers
5153312 540 Hemi Crate Engine—Carbureted 29,895.00
5153313 540 Hemi Crate Engine—Carbureted, Polished 33,499.00