To get the latest news about Performance Liquidations sales and new products, please enter your email address below.






You are here: Home > Engine Kits > Ford - 302 Windsor > 347 Cubic Inches (Big Bore) - 3.250 Stroke

Based on the Dart 4.125 Bore (Std) the Big Bore Ford 347 is designed for use when you want to greatly exceed the factory 302 block's 500 H/P practical limit. Whether you're aiming for a high compression screamer, plan on making power with Nitrous Oxide, going the turbo/blower route, or just looking for increased reliability for your street machine, these combinations are designed to do exactly what you need.
Flat Top
Flat top pistons in a 347 Ford 4.125 bore engine will generally provide compression ratios in the 10.2:1 range which makes them a good option for engines with cast iron heads with at least 68ccs, as well as any engine with aluminum heads. They are boost and Nitrous friendly and have valve reliefs configured to work with most types of standard and aluminum cylinder heads and will normally fit camshafts to slightly over .600 valve lift.

Villain - Cast Crank, through-bolt rods, forged pistons, designed for stock replacement and mild performance applications.

Vigilante - 4340 Forged Crank, I-Beam rods, forged pistons, designed for Street or Street and Strip performance applications.

Vindicator - 4340 Forged Crank, H-Beam rods (ARP-2000), custom forged pistons designed for serious Street or all out Strip applications.

Vanquisher - 4340 Forged Crank, H-Beam rods (ARP-2000), custom forged pistons designed for serious Street or all out Strip applications. All components are Made in the USA.
Dish Top
Dish top pistons in a 347 Big Bore Ford engine will generally provide compression ratios in the 8.6:1 range which makes them a good option for boosted engines. Valve reliefs are configured to work with most types of standard and aluminum cylinder heads and will normally fit camshafts to slightly over .600 valve lift.

Villain - Cast Crank, through-bolt rods, forged pistons, designed for stock replacement and mild performance applications.

Vigilante - 4340 Forged Crank, I-Beam rods, forged pistons, designed for Street or Street and Strip performance applications.

Vindicator - 4340 Forged Crank, H-Beam rods (ARP-2000), custom forged pistons designed for serious Street or all out Strip applications.

Vanquisher - 4340 Forged Crank, H-Beam rods (ARP-2000), custom forged pistons designed for serious Street or all out Strip applications. All components are Made in the USA.
Dome Top
Coming Soon!