How big do you want to go? We’ve got short blocks ranging from 509 to 632 inches based on MERLIN III blocks and other top quality components. More importantly, compare and you’ll discover that you can buy a professionally-built short block assembly for a price that’s comparable to purchasing parts alone from other sources.
More of the do-it-yourself type? All of our short block assemblies are available as kits- The blocks are machined, the components are balanced and sent to you for assembly!
TECHNICAL SPECS
Deck Height: 9.800” (509, 540), 10.200" (572, 632)
Bore/Stroke: 4.500” x 4.000” (509), 4.500" x 4250" (540), 4.500" x 4.500" (572), 4.500" x 4.750" (632)
Main Caps: 4-bolt nodular splayed
Crankshaft: 4340 Eagle/Scat internally balanced
Connecting Rods: 4340 Eagle/Scat w/L19 bolts
Pistons: Manley/Mahle
Piston Rings: Total Seal
Main Bearings: Clevite H Series
Internal Hardware: ARP
Compression Ratios (calculated with 119cc combustion chamber head, Fel-Pro 1017 gasket, and piston dome as indicated)
509 Street: 9.5:1, 12cc dome
509 Race: 12.8:1, 46cc dome
540 Street: 9.5:1, 5cc dome
540 Race: 13.5:1, 46cc dome
572 Street: 10.8:1, 15cc dome
572 Race: 13.7:1, 42cc dome
632 Street: 10.4:1, -6cc dome*
632 Race: 14.1:1, 33cc dome*
*Compression calculated with Fel-Pro 1057 gasket
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