American Powertrain’s New Pro-Fit 5-speed and 6-speed System For 1973-87 Chevy Squarebody Trucks

  The “Squarebody” Chevy truck is growing in popularity, so American Powertrain introduces its new Pro-Fit 5-speed and 6-speed system. This new Pro-Fit system features the rock solid TREMEC TKO 5-speed or the MAGNUM 6-speed transmission with all the installation parts you need for a complete installation. The Pro-Fit system includes American Powertrain’s