SMALL-BLOCK CHEVROLET PERFORMANCE RACE BLOCKS
24502503
350 CAST-IRON BOWTIE RACE BLOCK
- Cast-iron competition block right out of the box
- 4-bolt steel mains, 20° splayed caps on center three mains
- 2.000” O.D. cam bearings (1.867” I.D.) required at all five locations
- 3.980” finished bore
- 4.155” max bore (siamesed cylinder bores)
- 9.025” deck height
- Oil galleries for dry-sump system are oversized and tapped for pipe plugs
- Supplied with sonic data sheet
- Tested to over 700-horsepower
24502650
283 MAIN, 350 BORE SIZE SHORT-DECK BOWTIE RACE BLOCK
- CNC cast-iron competition block designed for drag racing, road racing, or restricted oval track racing
- 4-bolt steel mains, 20° splayed caps on center three mains
- 8.325” deck (standard-deck blocks are 9.025”); can be machined to 8.220” deck height
- Camshaft is raised 0.422” to 4.955”
- Cam bearing bores machined for 2.250” O.D. X 1.875 roller bearings
- 3.980” rough bore
- 4.185” max bore (minimum of .250 cylinder bore wall thickness)
- Integral oil restrictors
- Must use Big-Block water pump, must raise water pump with adapters for balancers larger than 6”
- Oldsmobile Aurora V-8 bell housing bolt pattern (12.24” max flywheel diameter)
- Lifter holes and cylinder head bolt holes are not drilled
- Will accept standard, SB2.2 and splayed valve lifter patterns
- Can be machined to accept any Small-Block Chevy cylinder head
- Shorter-than-production pushrods required
- Tested to 800-horsepower
- Water jacket core plugs are 1.5” press-in
- Oil galley plugs are AN O-ring style
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