10" Inch PTC Custom GN1 Exclusive Torque Converter This is a "10" Inch PTC Custom GN1 Exclusive Converter " for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. It's available from a 2800 to 4000 stall. Few minor... MSRP: Was: Now: $999.00 Choose Options