I have an on3 kit with upgraded IC, turbo, and mass air. 683hp stock block bored .020 dished srs pistons, h beam rods, 8 bolt crank, studded everywhere, stock heads. I was told an early 4.6 block is capable of 1000hp... dunno that I'll push that limit but... almost 700hp is fun too! lol Going to buy some shorties and an edelbrock intake and see what I get out of her.
1999 GT/Cobra clone
Built 4.6 2v, MP 70mm turbo Done blown'd it up!
New build Turbo teksid 4v swap