CALL US WITH ANY QUESTION YOU MAY HAVE, TOLL FREE 800-341-1528. WE HAVE MANY COMPRESSION RATIOS TO CHOOSE FROM.

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.



Here at CNC-Motorsports we have over 10,000 different short block, long block or complete engine packages. We will build for nearly every application, please call us 800-341-1528 for a quote on your build.



SB Chevy Short Block Assembly

Eagle / Scat forged 4340 steel crankshaft, internal balanced
Eagle / Scat forged 4340 steel H beam connecting rods
SRP forged Pistons
Performance Moly Pistons Ring Set
Clevite 77 / ACL high performance rod & main bearing set
Seasoned 4 bolt main block with ARP main bolts, 68-86 2pc rear seal block
Dura Bond Cam Bearings
Dura Bond Finishing Kit
Pioneer Brass Freeze Plugs
Victor Reinze Rear Main Seal
Professionally Machined, Balanced, Assembled and blue printed in house by CNC-Motorsports

ARP 2000 / L19 Rod Bolts (add $ 90.00)
Total Seal Gapless Top Rings (add $ 165.00)
Tri Armor Coated Rod & Main Bearings (add $ 125.00)
Dart SHP Block (add $ 800.00)
Dart Little M Sporstman Block (add $ 1,300.00)
Dart Little M Competition Block (add $ 1,700.00)
Main Studs (add $ 40.00)
1 Piece late Style 86-95 Roller 4 Bolt Block (add $ 125.00)

Seller Phone Number: 800-341-1528

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Item Location: BROOKINGS, SD Get Directions To This City

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