CNC Competition BB Chevy 509 Dart Short Block, Eagle Crank, Diamond 12.7:1 Pistons

CNC-Motorsports, has quickly raised the bar to a new level in offering high quality short blocks at an affordable price. Our short blocks have become a huge hit among racers and performance enthusiast all over the world. We have the ability to custom build you just about any combination the way you want it. All our short blocks are 100% machined, CNC Machined and blue-printed to our race wining specs. We never cut corners like others just to lessen the price.

BB Chevy 509 Short Block Assembly
New Eagle 4340 forged steel crankshaft (4.000 Stroke) **Internal Balance**
New Eagle H-Beam connecting rods bushed fit pins with 7/16 ARP 8740 bolts (6.135 Length)
New Diamond forged 46cc dome pistons (4.500)
High performance plasma moly piston ring set
ACL/Clevite 77 Rod and Main Bearings
Dura bond cam bearings
Brass freeze plug kit
Dura bond finishing kit
New Dart Big M sportsman block, short deck
Compression Ratio with 110cc Heads: 12.5:1
Compression Ratio with 118cc Heads: 12.7:1
Compression Ratio with 124cc Heads: 11.9:1

*Professionally Machined, Balanced, Assembled and blue printed in house by CNC-Motorsports. Balance card and blue print sheet will be provided to the customer. All short blocks are standard bore unless otherwise noted. We can custom build any short block assembly to meet your needs. *Ships Truck Freight*