When I put together a mirror to a stock 360 4bbl, with stock exhaust manifolds, stock converter, and 2.45 gears, I was told what a slouch it would be. In fact, one person posting in this thread right now told me he'd blow his car up if I hit my guess at 60 ft time that I guessed. :poke: :D Trying not to muddy the waters... Anyways, I hit my number but I always let the car tell me what it can and can't do.