ProTru by Wiseco 23 Degree Flat Top Forged Piston and Ring Kit - 4.060 in Bore - 1/16 x 1/16 x 3/16 in Ring Grooves - Minus 5.00 cc - Small Block Chevy PTS503A6 Pumper Systems AutoMeter's most advanced 1/8

AutoMeter's most advanced 1/8

Wing Cylinder Rebuild

ApprovedDoes not require an MSD Ignition ControlSupplied with an HEI style distributor cap and rotor (accepts Cap-A-Dapts)Polished steel shaft is QPQ coated and guided by a sealed ball bearingMaintenance-free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm rangeVacuum advance canister for improved economy (can be locked out)Easy-to-adjust mechanical advance with supplied springs and stop bushingsCNC machined billet aluminum housing and billet aluminum basePowerful built-in module produces a 7

GM Fullsize Truck 1973-75

ProTru by Wiseco 23 Degree Flat Top Forged Piston and Ring Kit - 4.060 in Bore - 1/16 x 1/16 x 3/16 in Ring Grooves - Minus 5.00 cc - Small Block Chevy PTS503A6 Pumper Systems AutoMeter's most advanced 1/8Chevrolet Small BlockWiseco Pro Tru is a division of Wiseco specializing pistons and piston rings for price conscious engine builders. They offer complete kits to fit a wide range of engines. Manufactured by Wiseco Performance Products, ProTru Forged Pistons are affordable with features usually found only in more expensive pistons. Product Description: Piston and Ring 23 Degree Flat Top Forged 4. 060 in Bore 1 16 x 1 16 x 3 16 in Ring Grooves Minus 5.