This is a very rare Z Code T/A 6.6L only 2,485 were produced in 1979 with the 400 Pontiac engine w72, ws6, 3.23 posi, 4speed car, the 4 speed has been replaced with an upgraded borgwarner WC-T5 5speed with lower 1st,2nd,3rd gears, So the 3.23 posi acts like a 3.73 posi. But the 5th gear is a 0.68 overdrive to make it act like a 2.20:1 to keep freeway rpm's down, and increased gas mileage, and also increased top speed. Factory 4 wheel Disc Brake, 15x8 snowflakes, AC, vehicle is in restoration statge most all body, mechanical, electrical, and suspension work has been completed, once work is completed you're looking at an easy 60k car. Vehicle is owned by a Mechanic Shop, and we are able to complete the restoration at additional cost. No Shipping LOCAL PICK UP ONLY, CASH ONLY IN-PERSON SALE to arrange viewing reach me@ six two six five eight seven two seven zero zero