(front) PRODUCTION-BASED BLOCKS The GM Performance Parts production-based ... to the high level of quality that GM is famous for. Remember, these are ... brand new castings that are machined to our exacting ... . One of these blocks has siamesed cylinder walls 1 and both have four-bolt main ... Mark IV, Gen V VI iron and aluminum cylinder heads Require Gen V or Gen VI design ... type cast iron 4-bolt block Siamesed cylinder walls 4.47" rough finished bore 4. ... of our 502 engine assemblies 1Siamesed cylinder walls have thicker cylinder wall ...
blocks are premium Bowtie big-block castings, built for the engine builder who wants ... (10.200") Accepts Mark IV, Gen V- VI cylinder heads Use Gen V head gaskets with Mark ... IV and Gen V cylinder heads Use Gen VI head gaskets with Gen VI ... cylinder heads Blind tapped head bolt holes, extra inner head bolt ... Honed cam and crankshaft bore Siamese Cylinder bores Improved cooling around No.1 ... cylinder .842" lifter bores, max 1.06", may be ... gear clearance at bottom of No.8 cylinder bore Each block supplied with sonic ...