Trans
Kaase determined that an automatic would be wimpy, so instead he spec'd a Tremec T56 Viper-spec six-speed bolted to a Quick Time bellhousing that houses a McLeod twin-disc clutch system. Imagine how little throttle it takes to move the car in First gear with just a touch of the gas pedal when your engine is making in excess of 630 lb-ft at 2,500 rpm.
The Car
Let's talk plain black wrapper, shall we? The car is a simple '07 Mustang with a set of 18x10-inch American Muscle five-spoke wheels in the back. Other than perhaps a distinctive rumble out the exhaust, Kaase's sleeper should seem like just a generic Mustang. Now you know.
Short-Block
Kaase traded for the aluminum race block that ended up with a massive 4.627-inch bore followed by a 4.375-inch-stroke Sonny Bryant steel crank. This 589-incher swings 6.800-inch steel Oliver rods and 10.5:1 pump gas-friendly Diamond pistons. The current cam is a mild Comp roller with 251/251 degrees of duration at 0.050-inch tappet lift pushing the net lift up to 0.660 inch. A trimmed Moroso oil pan clears the Mustang's rack-and-pinion steering.
Heads
This is where it all happens. Kaase built these heads to retrofit onto any production or aftermarket 429/460 Ford block. They are semihemispherical, which really means they're more wedge than Hemi. The Boss Nines feature 2.300/1.900-inch valves but do require specific shaft rockers. These heads are fitted with W. W. Engineering 1.75:1 rockers and Manley springs. The exhaust rockers are reminiscent of Hemi pieces with their exceptionally long arm length. If you have a set of production Boss 429 valve covers, they will bolt on, but Kaase has also designed his own Boss Nine covers that look very similar.
Intake
The Kaase heads will also require a Kaase-built single-plane intake like this one that mounts a CFM-built 1050 Dominator fuel mixer. The motor sits low enough in the chassis that with a 3x16-inch-diameter air cleaner (to clear the longer Dominator bowls), everything squeezes under the stock hood without a scoop or bubble to give away what's under it.
Exhaust
Chuck Lawrence built the 2 1/8-inch primary diameter headers with a 3 1/2-inch collector leading to a complete Granatelli 2 1/2-inch exhaust system that you can't see in this photo--but trust us, they're effective.
Accessory Drive
That's a Billet Specialties serpentine accessory drive on the front of this monster, complete with a new alternator and power steering pump. Even the A/C still works.