ENGINE BLOCKS
“Big M” Iron Engine Blocks The blocks that set the standard for big block Chevrolet include Siamese bores, scalloped water jackets, redesigned oiling systems, valley head stud bosses, adequate clearances for stroker cranks, and four-bolt steel main caps.
Deck Height
Main Cap
Part No.
Description
Bore
DRT31213344 DRT31213444 DRT31213454 DRT31213644 DRT31213654 DRT31223644 DRT31223654 DRT31223344 A DRT31223444 A DRT31273444VI C DRT31223454 A
Big M Iron Block Big M Iron Block Big M Iron Block Big M Iron Block Big M Iron Block
4.250" 4.500" 4.500" 4.600" 4.600" 4.600" 4.600" 4.250" 4.500" 4.600" 4.500"
9.800" 9.800" 10.200" 9.800" 10.200" 9.800" 10.200" 9.800" 9.800" 9.800" 10.200"
Steel Steel Steel Steel Steel
Big M Sportsman Iron Block
Iron Iron Iron Iron Iron Iron
Big M Iron Block
Big M Sportsman Iron Block Big M Sportsman Iron Block
Big M Mk VI Iron Block
Big M Sportsman Iron Block
A Sportsman Blocks do not include freeze plugs, coated cam bearings, and dowels. B 2.125" cam journal, +.600" raised cam, .904" lifter bore C 1-piece rear main seal
Dart Aluminum Blocks Dart aluminum blocks deliver big power in a lightweight block. Race series blocks incorporate increased deck heights and a raised cam location. +.400" raised cam height.
Deck Height
Main Cap Steel
Part No.
Description
Bore
DRT31264655
Aluminum Race Series
4.600"
10.200"
Chevrolet 502 CID Gen VI Bare Block Production-based Gen VI cast iron block features four-bolt main caps, standard 9.800" deck height, and 4.470"-4.500" bore range.
Deck Height 9.800"
Main Cap Iron
Part No.
Description
Bore
GMP19170540 †
502 Mark IV/GenVI Iron Block
4.470"
† 1-piece rear main seal
Edelbrock Cast Iron Engine Blocks By casting and precision machining these blocks in the U.S.A., Edelbrock can produce them to their own rigorous standards and the highest industry quality available in the mar- ket. Manufactured with 4.500" (max. recommended 4.600") bore Siamese cylinder walls, 4.500" max recommended stroke, hydraulic roller cam provisions, standard cam position, 4-bolt splayed nodular iron main caps, priority main oiling, 1- or 2-piece rear main seal, and designed to accept either 6- or 10-bolt timing cover.
Deck Height 9.800" 9.800"
Main Brg. Bore 2.9375" 2.9375"
Timing Cover Bolts
Rear Main
Part No.
Description
Bore
EDE450000 EDE450001
BBC Iron Block BBC Iron Block
4.500" 4.500"
10
2-Piece 1-Piece
6
193 2021-22 ENGINE BUILDER CATALOG
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