Iowa Chapter Director
Join Date: Jul 2002
Location: Ames, Iowa
A supercoupe block wouldnt be the only option, any supercoupe block, or 96+ block would work great, and a 2005 3.9L block would be excellent, and they're only 200 dollars new from Ford. Deffinetely use a supercoupe crankshaft or get a 4.2 crank from Ford as well, I believe they're 300 bucks. Then you'll want some forged rods, h-beam would be a good idea at that power level. Deffinetely forged dished pistons. Extensive port work isn't required either, this can be seen as fact in Matthew Neuharth's 587rwhp single turbo v6 mustang, which only has his own self ported heads with stock valves. He does, however, have a custom cam. I can tell you right now with a stock cam you will never reach your goal, it just won't flow enough. Matt has also put that power to a cast 4.2 Ford crank, so that would most deffinetely support your abuse. A single turbo will not create any more lag than a twin setup would, assuming you spec the turbo correctly. Turbo technology is so advanced nowadays that lag is not as much of an issue anymore.
You will deffinetely want a beefed up transmission, that should go without even saying. with the power band you'll have the stock TC would explode, and your stock tranny internals would burn out very quickly. a high stall TC will virtually eliminate your turbo lag and give you an amazing torquey launch.
1988 Notch Mustang: - 438W, direct port n2o, t56
2003 SVT Focus: - SCT X3 tuner