World Products offers a new alternative for enthusiasts and engine builders on a budget, the MERLIN III STREET block! The same MERLIN III block you've come to depend on for the last decade, but with a new lower price.

With a thicker wall casting over OE, a big stroker build is possible, as the MERLIN III STREET can be bored to 4.625” and accepts a 4.250” stroke, or even up to 4.375” with clearancing! Don’t settle for anything less!

Material: High density cast iron
Bore: 4.490 unfinished
Max Bore x Stroke: 4.625" x 4.250 max recommended (4.375” stroke capable with clearancing)
Cam Bearings: Standard OEM BBC
Cylinder Wall Thickness: .200" minimum @ 4.600 bore
Deck Height: 9.800"
Fuel Pump: Mechanical pump provision
Lifter Bores: GM spec .8437" +/- .0005"
Main Bearing Size: Standard OEM BBC
Main Cap Bolts: 1/2" (all caps)
Main Cap Bolt Torque: 100 lb-ft with moly
Main Caps: Nodular straight, 4 bolts(all caps)
Main Cap Register: In addition to stepped registers on each side, ring dowels are employed to eliminate cap walk
Oil System: Priority main oiling, wet sump, machined for dry sump
Oil Filter: Standard OEM BBC, uses 2 bolt filter adapter
Oil Pan: Standard OEM BBC
Rear Main Seal: Standard OEM BBC 2 piece
Starter: Standard OEM BBC
Head Stud Holes: Blind holes
Timing Chain/Gears: Standard OEM BBC
Weight: 270 lbs.