i have a 2000 z28 a4 car with a fresh built 370 6.0 callies compstar rods diamond pistons hell fire rings arp main studs ported oil pump custom grind cam prc 227 heads ls6 intake edelbrock headers 3.5in exhaust built 4l60e circle d billet converter new wheels and tires have spare rearend and trans the car has 2.73 gears at the moment but I have 3.23, 3.42, 3.73, 4.10, and 4.56 gears to go with it also have a extra level 5 ftl trans to go with it....... will consider trade for a full tube buggy I will not give boot the car still has a/c and is full weight it runs 7.20s all motor with 2.73 gears