Thinking on it now, each of these components need their own post. Still working on how to frame all this information so it the most useful. WIP.

We’re going to squeeze every bit of power out of this engine while still fitting within the rulebook. Here’s the map to get there:

Engine Block –

Important Rules-

• GM Builds must us 350 Block
• Dart SHP Block pn 3116111 Allowed

Build Spec – Dart SHP Block 3116111

• Brand new casting
  • Eliminates chance of finding cracks or core shift
• Priority Main Oiling
  • Feeds main bearings before cam bearings and lifters
• Thicker, Stiffer Casting + 4 Bolt Splayed Mains = More Power

We’ll start with a brand-new Dart SHP Block. The last engine we built was with a Stock 010 4 Bolt Main block, and it cracked after only one season. The Dart SHP Blocks are much beefier than a stock block, so there’s no chance of cracking it with the power output we’ll be making. The beefier block and splayed mains result in reduced block flex under load, which means less friction in the engine and increased power output. I’ve heard the block itself is worth 5 hp over a stock block, but we’ll see.

Cylinder Heads –

Important Rules –

• OE Cast Iron Heads
• 10 : 1 Max Compression Ratio
• No Porting/Polishing
• Max Valve Size: 2.02 Intake, 1.60 Exhaust

Build Spec – L31 Vortec Heads (062 or 904 Castings)

• Best flowing stock head
• Most efficient combustion chamber
• Swirl port promotes better charge mixture

“The Chevrolet L31 5.7L Vortec cylinder head is the best flowing production head Chevy has made for the Gen I SBC engine to date.” They flow the best. It’s the best chamber design. More quench area than standard wedge designs. Swirl ports mean a more homogeneous charge mixture, and a faster burn rate. They’re the best. The chamber size is a little small for the compression rule, but we’ll make it work.