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DART Chevrolet Big-Block Big M Sportsman Engine Block 4.600" Bore - STD DECK

$3,367.00

Product Description

DART Chevrolet Big-Block Big M Sportsman Engine Block 4.600" Bore - STD DECK

 

With multiple deck heights and bore sizes up to 4.600", the Big M Sportsman block gives you the versatility to build a wide variety of engine combinations. A true priority main oiling system oils the main bearings before the lifters for extra reliability.

Features:

  • Standard 9.800" deck height
  • Standard 4.250" , 4.500" or 4.600" bore sizes with siamesed extra thick cylinder walls to resist cracking and improve ring seal (minimum .300" thick with 4.625" bore)
  • Uses +.300" tall Gen VI style lifters. Modification for Gen IV style available
  • Scalloped outer water jacket walls improve coolant flow around the cylinder barrels to equalize temperatures
  • 4 bolt ductile iron main caps have splayed outer bolts for extra strength
  • True priority main oil system lubricates the main bearings before the lifters. Our stepped main oil gallery (9/16" to 1/2" to 7/16") increases the flow of oil to the crank at high rpm, and our front oil crossover eliminates internal oil leaks around the distributor shaft
  • Oil filter pad is drilled and tapped for an external oil pump
  • Lifter valley head stud bosses prevent blown head gaskets
  • Rear main cap uses standard oil pump and two piece seal - no adapter required!
  • Mechanical fuel pump boss, clutch linkage mounts, and side and front motor mounts simplify installation in any chassis
  • Dual oil pan bolt patterns fit standard and notched oil pans
  • Small bore 396 version available
  • Coated cam bearings, freeze plugs and dowels are NOT included

 

PLEASE NOTE: ALL DART PRODUCTS ARE AN ORDER IN ITEM AND MAY TAKE UP TO 12 WEEKS EX. USA

PLEASE CONTACT US PRIOR TO PURCHASE TO CONFIRM STOCK LEVELS

 

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