1988 Ford Mustang Boss 302 Crate Engine - Boss 302 Crate Engine

Huh? What's A Boss?
In 1969 Ford was required to build 1,000 Boss 302 Mustangs and sell them to the public to qualify for Trans-Am competition. The first Boss engine designed for this had a 302 short-block and used Tunnel Port heads that produced a reported 450 hp, but high-rpm longevity issues (parts-flinging explosions) coupled with the high cost of production and terrible street manners made them track-only. The Boss 302 that ended up in the street version of the Trans-Am car in 1970 was a 302 short-block with a version of the then-new 4V Cleveland head. It was better than the Tunnel Port, but the 2.23/1.71 valves and a four-finger intake port made a steep gear and high revs a necessity. The '69 to '70 Boss has four-bolt main caps instead of the standard two, a forged-steel crank and rods, 10.5:1 pistons, and distinctive screw-in freeze plugs. The new Boss 302 uses the strength of the four-bolt caps and forged rotator, the look of the Boss screw-in plugs, and production Windsor-style cylinder heads that flow at street-rpm levels. Aside from the '69 to '70 Boss 302 intake manifold and headers, all the parts from these three engines are interchangeable.

PARTS AND PRICES
DESCRIPTION	PN	PRICE
Boss 302	M-6007-X302B	$6,695.00
Ford Racing Z heads	M-6049-Z304P	899.00 each
Holley 650 HP	0-82651	501.95
MSD distributor	8582	232.90
Trick Flow intake gaskets	2855	10.95
Ford Racing intake gaskets	M-9439-B302	12.99
Mobil One oil	N/A	25.00/5 quarts
Weiand Action Plus	8124	156.95
Weiand Stealth	8020	175.95
Weiand X-Celerator	7515	181.95

The Boss comes with a reverse-rotation water pump for serpentine belt systems and an oil pan designed to fit Fox chassis cars. If you want to plop this thing in an early Mustang, you can use a pan from Milodon.
The Boss comes with a reverse-rotation water pump for serpentine belt systems and an oil p
Ford recommends a 650-cfm carburetor, so we used the Holley 650 HP. It has mechanical secondaries, a smoothed body, and all the tuning capabilities of the larger HP-series carbs. We ran it out of the box with 69/75 jets for all three tests averaging 12.0 A/F ratio.
Ford recommends a 650-cfm carburetor, so we used the Holley 650 HP. It has mechanical seco
It looked like the engine was prelubed from the factory, but to be safe, we added some Mobil 1 synthetic oil and primed the oiling system with a hand drill.
It looked like the engine was prelubed from the factory, but to be safe, we added some Mob