Use aftermarket aluminum blocks for the most demanding racing applicaitons that require increased strength with light weight, great for circle track applications where car handling is of a major concern

On Line Performance Parts

MERLIN - BB CHEVY ALUMINUM BLOCKS

3 Deck Heights For 572, 638, or 750+ Cubic Inches
Minimum Machining Reduces Engine Prep
Made From Lightweight Super Strong 355-T6 Aluminum

Merlin  Aluminum Racing Blocks are designed for Maximum Strength, Reliability and

Displacement Requiring Minimum machine Preparation Reducing Overall Cost

The front view of an 11.625" Merlin Superblock (at left) shows

its additional deck height, relocated main oil galley and a billet

steel 4-bolt front main bearing cap. The main oil galley (arrow

at left) has been moved alongside the camshaft journals to

increase lubrication, greatly simplifying Stroker machining. The camshaft center line on 11.625" blocks

is raised .400" to accommodate the extra clearance for that longer throw/stroked crankshaft for

increasing displacement. Each Merlin block accepts all factory accessories including the clutch pivot

boss and fuel pump boss. Additional main bearing boss webbing ties all the bolt bosses together. 

The combined  strengths by  increasing rigidity produces less block flex.

Merlin Blocks use four extra head bolt bosses on both sides of the intake valley that

match the bolt patterns of Chevy and Olds/Pontiac pro stock heads. Head bolt holes are blind

tapped to eliminate the possible for water leaks. Reinforced, extra thick (.625" thick) deck surfaces

improve head gasket sealing. On all three block versions, cylinder wall thrust areas are at least .400"

thick @ 4.625" bore diameter. 9.800" and 10.200" versions are shipped with 4.430" Siamesed bores

while 11.625" Superblock bores measure 4.490". All three blocks can be bored up to 4.625". Lifter

bores are indexed and reinforced.

World Products has incorporated every possible detail into the new Merlin blocks.

Extra wide, dual pattern oil pan rails (see arrows at left) on 9.800" and 10.200"

blocks are drilled to accept both stock configuration and Olds DRCE style oil pans. 11.625"

Superblocks feature an Olds DRCE pan rails that are already machined for Stroker clearance. As the

main oil galley has been moved, oil pan rails can be machined for Stroker cranks without danger of

hitting oil (or water) passages. An 11.625" Superblock will accommodate a 5.600" crankshaft.

The oil filter boss, as shown at the left, has been moved outward .550" to accommodate large kick-

out oil pans. Provisions for both left and right starter mounting suits a greater variety of oil pan and

chassis configurations.

The billet steel main caps install against close tolerance index channels to eliminate side- to-side

movement. Maximum strength allows for greater power with increased reliability.

Incredibly strong, billet steel, splayed 4 bolt main caps with ARP main studs are exclusively used .

9.800" and 10.200" caps are 8.200" wide, while 11.625" blocks feature 8.875" wide

intermediate caps. Main saddles accept stock 2.750" crank journals with main cap bolt spacing

increased to permit line boring for 3.000" crank journals. Larger journals improve journal overlap

which in turn increases crankshaft strength.

Solid front and rear bulkheads (arrow A at left) are a full 1.00" thicker top-to-

bottom than Chevy Bowtie bulkheads. This feature is specially important in

supercharged applications where Other blocks' bulkheads have a tendency to flex and  crack when

under extreme stress. You simply will NOT find a better design than the Merlin Block. Merlin blocks

are so rigid they actually make more power over the competition's by not flexing and throwing the

reciprocating assemblies out of alignment When the cheaper block flexes the reciprocating assemblies

have to also flex, but as they are moving cycle after cycle. The crankshaft develops cracks, sometimes

spins main bearings or sometimes its piston to connecting rod damage, The moving mass always takes

the toll. Be safe with your racing investment, get a Merlin Lite Superblock right off the bat.

Merlin 2 Combinations Max Recommended bore 4.560
Merlin Splayed Cap Block Max Recommended Bore 4.625

Most Bocks Ship with 4.490" Bore Size, Special Order bore sizes available, call for availability

DART Small Block Chevy Block
Click Here For Spec Sheet

NEW CHRYSLER / MOPAR STYLE

ALUMINUM RACING BLOCKS

Indy Pro-440 Aluminum Big Block 440 Chrysler Block

Built by Indy for Exclusively for World Products

Indy Pro - 440 Block for Big Block Chrysler. Most commonly built as a 572 Cu. Inch

Engine (4.500" bore x 4.500" Stroke). This Strong Ultra Light Weight Block Features Siamese

Bores, 10.720' Raised Block Deck Height, An Isolated Main Oil Galley, Cross - Bolt Steel Billet

Caps, and Accepts all Factory MOPAR Parts. Couple this block with a pair of Bench Flowed

Aluminum racing heads and you can launch your favorite MOPAR down the track with extreme

power, increased reliability with lighter weight. The power to weight ratio of these aluminum engine

components in a lightweight chassis is phenomenal. If your into Big Block Mopar, this is the

block for you!

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