oops.. replied while you were replying.. just 318 for now, 390 next year. as i said in the first reply. I haven't decided on tires yet. And i will be upgrading the rear end if i find a deal on a pig.. guys wanting 800+ for a rebuilding center section just burns my ***.. This is the first car i have done in 20 years and back then it seemed like parts were every where for next to nothing :) Eventually probably just 3.55's though. i have run 3.91's and 4.56's in the past and it just gets old after awhile on the street