Free Shipping & Handling on Orders Over $95 - Order by 11pm EST for Same-Day Shipping!
Shop By Vehicle
Shop By
All Categories

Gift Certificates
My Account
E-Mail Signup
Catalog Request

Dart 31283445

Big Block Chevy Big M Pro Engine Block 4.500" Bore

Dart 31283445

Part Number: 301-31283445

Big Block Chevy Big M Pro Engine Block
  • 4.500'' Bore
  • 9.800'' Deck Height
  • $3,588.07
    from Manufacturer
    Truck Freight: $119.00
    Dart 31283445 Big Block Chevy Big M Pro Engine Block 4.500" Bore $3,588.07
    Includes $1060 JEGS Gift Certificate to Use on Your Next JEGS Purchase!


    Manufacturer's Part Number:

    The Dart Big M Pro Cast Iron Big Block is a no compromise design that solves the problems that have plagued big-block racers for years. Working with top builders and Dart's own championship-winning Pro Stock engine department, they have designed a user-friendly block with the features you need today. For example, Dart redesigned the lubrication system to create a true ''priority main'' system that oils all of the main bearings before the lifters for extra reliability. Next Big Blocks are prone to head gasket failure in long spans between head bolts. Dart has added two head stud bosses on both sides of the lifter valley to take the place of the ''missing'' head bolts.

    With bore sizes up to 4.600'' and deck heights from 9.600'' to 11.100''; the Big M Pro gives you the versatility of build a wide variey of engine combinations!

  • Raised Camshaft Location +.600''
  • Oil Pan rails spread +.750''
  • Accepts Stroke Combos up to 5.500''
  • Priority Main Oiling
  • Billet Steel Main Caps
  • Lifter Bores .904''
  • 2-Piece Rear Main Seal
  • Includes Coated Cam Bearings, Freeze Plugs & Dowels

  • Items You Need