For Super Class or bracket race applications using strokes of 4.250 or less, I preferred the OEM 9.800 Mark IV thick walled blocks to the aftermarket Merlin or Dart Blocks. With a 4.250 crank, a 1.125 pin height 4.310 piston can be used with a 6.535 rod length, yielding a 1.53 rod/stroke ratio, which is virtually identical to a 454.

A race prepared, fully poured OEM style block will weigh in 80 to 110 pounds LESS than an aftermarket iron block. 100 lbs. is a TENTH in et, plus or minus! Any advantage the aftermarket 540 gains in power is lost lugging the extra weight around. Overbore capacity is about the same (+.125) and in my experience, the cost to purchase and prepare a good OEM thick walled block was less. Converting to main studs and billet steel caps result in a strong and dependable high performance foundation for these applications.

CHECK OUT THIS KILLER COMPONENT PACKAGE:

1) Virtually New, virgin GM Mark IV HP 4-Bolt Main, 9.800 Thick Walled (safe overbore plus .125), 2pc Rear Main Seal Truck Block fully machined: bored and honed to 4.310, Square and Parallel Decked, heavy duty BILLET STEEL MAIN CAPS with ARP Main Studs, Align Bored and Honed, new Cam Bearings and Block Dowels installed. HAS NOT BEEN POURED, could be used on the street. Flat top pistons will make a very strong pump gas High Performance/Pro-Street/Bracket motor!

2) NEW 4340 EAGLE 4.250 Internal Balance, Cross Drilled, Large Radius BBC Crank

3) NEW 4340 EAGLE 3D 6.535 H-BEAM Rods with super high strength ARP L19 260,000 psi Bolts

4) NEW MOROSO ALUMINUM 7qt. Stroker ALTERED/DRAGSTER SIDE KICK-OUT OIL PAN with Trap Doors and Full Length Bolt-in Coated Windage Tray

5) Solid JW-The Wheel-BBC internal balance SFI flywheel-Used

6) TCI Rattler internal balance BBC harmonic damper with crank trigger plate-lightly used unit

$3475 plus shipping FOR THE WHOLE PACKAGE!
Card payments accepted through PayPal plus 3 percent.

Seller Phone Number: 423-257-3139

This item is NEW

Trades NOT ACCEPTED

Payment options:

Bank Check

Item Location: LIMESTONE, TN Get Directions To This City

This ad expires in 49 days.