Mechman 250amp Billet Alternator This is a "Billet Mechman 250 AMP Alternator" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. This high output alternator is a direct fit and puts out 250amps. It... MSRP: Was: Now: $569.00 Add to Cart