Chevrolet Performance DRCE (Drag Racing Competition Engine) Big Blocks are the foundation of many of the most powerful Pro Stock Drag Racing engines. Developed specifically with 500-cubic-inch Pro Stock engines in mind, the DRCE family of engine blocks is the latest evolution of Pro Stock engine design. In order to build optimum performance, DRCE blocks have bore spacing that allows for the preferred big bore/short stroke crankshaft
combination. The camshaft has been raised & the distributor moved. The big bore design unshrouds the heads, which means bigger valves can be used. The result is maximized air/fuel mixtures. DRCE blocks are solid without lifter or head bolt holes so any GM big block cylinder heads may be used, and blocks are gray iron or compacted graphite (an extremely strong material that helps combat bore distortion & crank deflection under stress).
CNC-machined to +/- 0.001'' tolerances
Siamese cylinder bores with 4.900'' spacing
No lifter bosses (solid bar can be drilled as required)
No head bolt holes
Numbers two and four main bearing bulkheads moved 0.060''
Bellhousing bolt pattern accommodates Chevy, Pontiac, and Oldsmobile transmissions
Uses big block Chevrolet crank, camshaft, balancer, flywheel, and water pump
Requires camshaft with distributor gear behind rear bearing
Priority main oiling dry sump system
Dual starter mounting locations
Front engine mounts only
Each block is supplied with sonic test data sheet