331 cubic inch stoker kits are based on the 4.000 bore 302 Windsor engine block and a cast steel 3.250 stroke crankshaft. They are a perfect replacement for the 302 if you want the increased power and torque you get from a larger engine. Aftermarket cylinder heads and larger camshafts are a good addition to complement the increased capacity. Custom combination are also available for specialized applications.
Flat top pistons in a 331 inch Ford engine will generally provide compression ratios in the 10.0:1 range which makes them a good option for engines with aluminum heads or larger cc iron heads. 450 Horsepower (flywheel) levels are typical with aftermarket heads and camshafts. 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 Steel Crankshaft, 4340 Forged Steel I-Beam Rods, Probe SRS Series Forged Pistons. Designed for stock replacement and mild performance applications.
Vigilante - 4340 Forged Steel Cranksaft, 4340 Forged Steel H-Beam Rods, Probe SRS Series Forged Pistons. Designed for Street or Street and Strip performance applications.
Vindicator - 4340 Forged Steel Crankshaft, 4340 Forged Steel H-Beam Rods (w/ARP-2000), Probe PRS Series Forged Pistons. Designed for very serious Street or all out Strip applications.
Vanquisher - 4340 Billet Steel Crankshaft, Premium Connecting Rods (w/ARP-2000), Probe PRS Series Forged Pistons. Designed for very serious Street or all out Strip applications. All components are Made in the USA.
Dish top pistons in a 331 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 Steel Crankshaft, 4340 Forged Steel I-Beam Rods, Probe SRS Series Forged Pistons. Designed for stock replacement and mild performance applications.
Vigilante - 4340 Forged Steel Crankshaft, 4340 Forged Steel H-Beam Rods, Probe SRS Series Forged Pistons. Designed for Street or Street and Strip performance applications.
Vindicator - 4340 Forged Steel Crankshaft, 4340 Forged Steel H-Beam Rods (w/ARP-2000), Probe PRS Series Forged Pistons. Designed for very serious Street or all out Strip applications.
Vanquisher - 4340 Billet Steel Crankshaft, Premium Connecting Rods (w/ARP-2000), Probe PRS Series Forged Pistons. Designed for very serious Street or all out Strip applications. All components are Made in the USA.
