One-Piece Rear Main Seal Race Block (front) GM PERFORMANCE PARTS RACE ... BLOCKS Our race blocks take the guess work out of what block ... you need to make big horsepower that is competition tested ... offer you such a huge selection of race blocks that have been precision, CNC-machined ... with tighter tolerances than our Bowtie blocks before you even get them. These blocks ... race-prep machining, 4-bolt splayed 4 main caps, and the very highest grade of ... to your GM Performance Parts race block! See chart on page 132 for complete ... . GM Performance Parts Race Block Technical Notes: These blocks are CNCd ... tolerances! Cylinder decks, front and rear of case, oil pan rail surfaces and head ... cam bearings required (see each block for details) Cam bosses are enlarged ...
Short Deck Race Block (rear) Short Deck Race Block (front) Four- ... Bolt Main Caps 137 24502503 350 Cast Iron Bowtie ... Race Block Cast iron competition block right out of the box 4-bolt SAE 8620 ... steel mains, 20 splayed caps on center 3 mains 2. ... to over 700 horsepower! B. 24502650 283 Main, 350 Bore size Short-Deck Bowtie Race ... Block CNC Cast iron competition block designed for drag racing, road racing ... track racing! 4-bolt SAE 8620 steel mains, 20 splayed caps on center 3 mains 8. ... 325" deck (as of 10/03) (standard deck blocks are 9.025"), can be machined to 8.200" ... ) Integral oil restrictors Must use Big Block water pump, must raise water pump ... with adapters for balancers larger than 6" Olds ... Can be machined to accept any small-block Chevy cylinder head Machined as 4. ...