DART Big M Block CHEVROLET 427 BIG BLOCK


Images May Not be Vehicle Specific. For Display Purposes Only.

Images Of This Specific Part Number

Non-Specific Images

Place Order Here

Part #: 31273454
Notes: Big M Block
MSRP: $2,513.53
Your Price: $2,442.27
Free Shipping

Specs

Cyl Bore 4.500in
Deck 10.200in

This Item Also Available In

Part Number Price Notes & Specs
31263344 $2,695.94 Notes Big M Block
Cyl Bore 4.250in
Deck 9.800in

All Fitments

CHEVROLET
Year Model SubModel Cylinders Liter Aspiration Eng Desg. Fuel Notes
1966 - 1969 427 BIG BLOCK ALL ALL ALL ALL ALL ALL
1970 - 2000 454 BIG BLOCK ALL ALL ALL ALL ALL ALL

Product Description

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” and tall 10.200” deck heights available for stroker engines.
  • 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.
  • 2 bolt front and rear and 4 bolt interior ductile iron main caps have splayed outer bolts for extra strength – OR – 4 bolt billet steel main caps have splayed outer bolts for extra strength.
  • Crankshaft tunnel has clearance for a 4.500” stroke crank with steel rods without grinding.
  • 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.
  • Available in traditional Gen IV style, or in Gen V or Gen VI style with one piece rear seal.
  • 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.
  • Coated cam bearings, freeze plugs and dowels are included.

Product Reviews

Be the first to review this item.

Rating
Title
Review