CHEVY 383 CLAIMER SHORT BLOCK

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MANY OTHER COMBINATIONS AND COMPRESSION RATIOS ARE AVAILABLE.

Here at CNC-Motorsports our short blocks start with premium cores. We first start by clean, magnaflux, and sonic test the thrust sides of the cylinder walls for a minimum of .200” thickness after overbore. All blocks are then line honed to get a baseline for all of the BHJ blueprinting fixtures. From this point we square up the decks using BHJ’s Blok-Tru to get the desired deck heights. Once this is done we bore the block using BHJ’s Bore-Tru to get the desired spacing. There are quite a few blocks that are not able to have this done, due to they are either to far off from the factory or previously bored in the past. Either way we utilize this procedure when possible.

The next step is the honing process. We install main caps and torque plates to ensure cylinder bores ends up as true to actual running conditions as possible. In our honing process we aim for around 30º crosshatch to achieve the most compression while still allowing the rings to travel. Bores are measured with plates still attached and recorded on the blue print sheet.

Once all the machine work is completed, the block is washed and prepped for assembly. During the assembly process, all components are measured and corrected to obtain correct clearances. All of these measurements are recorded on the blueprint sheet.

Rotating assemblies in these short blocks are all weight matched, and the crankshaft is balanced with in ½ of a gram.

Here at CNC Motorsports we strive for excellence in our craftsmanship to provide our customers with the performance parts at a perfect price.


SB Chevy Short Block Assembly

Eagle Cast Steel Crankshaft, External Balance
Eagle SIR Lightweight I Beam Rods, Press Fit
Keith Black Cast Claimer Pistons
Performance Moly Pistons Ring Set
ACL / Clevite 77 Rod & Main Bearings
ARP Main Bolts
Dura Bond Cam Bearings
Dura Bond Finishing Kit
Pioneer Brass Freeze Plugs
Victor Reinze Rear Main Seal
New Harmonic balancer and flexplate included.

4 bolt Main Block (add $ 100.00)
Scat Pro Comp I Beam 7/16 Rods (add $ 75.00)
1 Piece Rear Seal Late Style 87-95 4 Bolt Main Roller Block (add $ 125.00)
H Beam Rods (add $ 150.00)
Dart SHP Block (add $ 750.00)
Internal Balance Crankshaft, (still includes harmonic balancer and flexplate) (add $ 85.00)
Scat 9000 Series Crank, 9-350-3750-5700, Scat Rods 2-ICR5700 (add $ 125.00)

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Item Location: BROOKINGS, SD Get Directions To This City

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