Description: Competition-tested engine blocks. Only GM Performance parts can offer you such a huge selection of race blocks that have been precision CNC-machined with tighter tolerances than their Bowtie blocks. These GM Performance Parts SB2.2 engine blocks feature full race prep machining, 4-bolt splayed main caps, and the very highest-grade materials throughout.Additional features include:* Blueprinted cylinder decks, front and rear of case;(more)

Description: Competition-tested engine blocks. Only GM Performance parts can offer you such a huge selection of race blocks that have been precision CNC-machined with tighter tolerances than their Bowtie blocks. These GM Performance Parts SB2.2 engine blocks feature full race prep machining, 4-bolt splayed main caps, and the very highest-grade materials throughout.Additional features include:* Blueprinted cylinder decks, front and rear of case; oil pan rail surfaces and head dowel pins are blueprinted* Camshaft bosses are enlarged to allow machining for the use of larger cam bearings * Extra-thick main bearing bulkhead machined at 5 degrees* Premium-quality studs and SAE 8620 steel main bearing caps* et wet sump rear main cap can be adapted to dry sump with plugs* Bearing cap inner bolts are spread .210 in. to allow machining for the use of 400 journal crankshafts* Priority main oil system* Two-piece rear main crankshaft and pre-1986 oil pan rail* Extra-thick deck surfaces with blind-tapped head bolt holes for improved head gasket sealing* Sonic bore test data sheet* Oil dipstick holes are not drilled (minimize)