Technical Specifications of...
Merlin-X Aluminum Blocks

Material: 357-T6 aluminum (strongest available)
Deck Height: 9.800" or 10.200" (tall deck)
Deck Thickness: .600" minimum
Cam Bearings: Standard Chevrolet big block set
Main Bearings: Standard Chevrolet
Camshaft Location: Stock
Lifter Bores: Indexed (stock .843" bore)
Bore: 4.240" (hone to 4.250") , 4.490" (hone to 4.500") or 4.590" (hone to 4.600")
Maximum Recommended Bore: 4.600"
Cylinder Wall Thickness: (.115" @ 4.500" bore, .065" @4.600" bore)
Water Jackets: Expanded for better cooling
Lubrication: Priority main oiling system
Oil System Features: Integral boss for front feed, boss for rear scavenge rear main cap has provisions for wet sump pump, drilled for dry sump valley scavenge lines, cross-feed lines between left and right lifter oil galleys
Filtration: Integral mount for spin-on filter
Oil Pan Rails: Solid (stock width) can be clearanced for strokers
Crank Clearance: 4.375" for short deck, 4.750" for tall deck block (using H-beam steel rods - sleeves may require notching)
Main caps: Splayed billet
Mounts: OEM starter and oil filter mounts
Block: Side ribs for extra strength & cooling - cross-ribs in valley
Motor Mounts: Dual (front and side)
Cylinder Head Holes: Blind tapped to prevent leaks
Weight: Approximately 140 lbs. with sleeves - ready to run