5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

289 - 302

Old 04-08-2007, 12:38 PM
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Join Date: Dec 2006
Location: Citrus County, FL
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Default RE: 289 - 302

the 289 heads dont flow as good as the E7's, they are nothing special BUT the stroke and rod length of a 289 makes it superior to a 302 for two reasons.....

faster revving
higher rpm ceiling

they use the same piston, and because of this and the shorter stroke they use a 5.155 rod instead of the 302's 5.090 rod. better rod/stroke ratio is a good thing.

FYI, i head that you can use the older 2 piece rear main seal cranks in a later 1 piece block by simply having a raised rib on the rear sealing area machined down when the shop regrinds the crank. that would be your best bet cause you'd retain a roller lifter block with the benefits of having a 289.

and btw, the HP you'll loose by giving up 13 cubic inches will be more than made up for in the benefits stated about the 289
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