Factory Five Racing Gen 3 Type 65 Coupe, Owner'S Manual

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www.factoryfive.com 508-291-3443
Heads
The 5.0L Mustang aftermarket is full of aluminum and cast iron heads for the small block Ford. Our favorites
are the
Edelbrock Victor Jr. and the Trick Flow aluminum heads. These both flow very well, have stock
exhaust port heights which allows the use of our headers and not only give you extra horsepower but also
remove 50 lbs. in the process.
Cams
If you need to pass emissions testing, use a cam with a CARB number. We like the Ford E303 cam. We have
used it with success in our racecars both naturally aspirated and in boosted applications. If building a more
radical engine, match the cam to the combination.
Headers
Stock 1987-1995 Mustang: 1½” OD
We’ve found that the Mustang factory headers work well for the stock engine. If you want to go to an
aftermarket set, the 1⅝” MAC shorty unequal length headers or Ford Racing 1⅝” unequal length headers fit as
bolt on parts. They will reward you with an approximate 5-10 hp bump in the top end. All aftermarket headers
use mandrel (smooth consistent bends) bent tubing. The stock ones are not and are restrictive on non-stock
engines.
If using a 351W engine there are two options, use 351W engine swap headers from Ford Racing (M-9430-A58)
or MAC (E358692) or if smog/catalytic converters are not necessary, use our full length 4 into 4 headers.
Timing
Most computer chips simply change the timing of the engine and slightly enrich the mixture. Using a timing
light, advancing the base timing to 14

will do the same. Higher octane fuel will be needed.
Under-drive Pulleys
Yes. They work well on all cars.
Oil Cooler
Not really necessary on small blocks or cars that aren’t raced heavily. They look nice when installed in the
smaller opening below the radiator. For supercharged/turbocharged or big block track cars an oil cooler will
help.
Factory Five offers an oil cooler with #10 Stainless Steel braided lines and mounting bracket.
High Horsepower Transmissions
The stock T-5 is good for the stock 302 engine. A change to a Tremec TKO 500 or 600 is needed if the engine
that will be used has 300lbft of torque or more. One unique feature of the Tremec TKO is it allows the shifter
to be relocated 8” forward of the normal shifter location if a vertical shifter is desired verses a forward angled
shifter.