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www.factoryfive.com 508-291-3443
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.
Ford Racing offers 1⅝” unequal length Stainless Steel headers that are bolt on parts. They will reward
you with a nicer look and a small horsepower increase.
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.
Bellhousing
If you are changing your transmission or want some safety piece of mind, using a SFI approved safety
bellhousing makes sense. These usually have mounting locations for many different transmissions built
into them. Ford Racing, McCloud, Lakewood, and Quicktime are a few companies that make Ford
specific ones.
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