615-bbc-short-block

Popular for both extreme street cars (e.g., Drag Week champions like Tom Bailey) and bracket racing.

📍 It provides the best horsepower-per-cubic-inch ratio for a conventional deck big block. PAR Racing Engines' 615 Big Block Chevy Engine 615-bbc-short-block

Some veteran builders warn that the long stroke in a short deck can cause pistons to "rock" at bottom dead center, potentially leading to bore wear if not clearanced perfectly. Popular for both extreme street cars (e

The 4.625" stroke requires extensive internal machining for rod-to-cam and rod-to-block clearance. 615-bbc-short-block