[olddog]

5.0 with GT-40 aluminum heads 345 Hp, no intake or dizzy shipping weight 425 Lb. Note 225 hp was the most I can recall for a production car.

2005-06 Mustange 3 valve 4.6 only 420 lb full dress. Significantly lighter than a factory iron head 5.0!

2003 Mach1 4.6 4 valve 305 Hp & 320 ft lb.

5.0 Modular exceeds 400 hp and 365 ft/lb naturally asperated.

Now that we have the facts, heavy compared to what? Performance poor? People turning 400 hp (at the wheels) @ 7000 rpm just by sticking a blower on a factory engine and tuning. Let's see a hot rodder is supposed to hate this? Oh buy the way a Mustang will still do 22 MPG with a 400 Hp engine.