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.

E6 heads on a 255 c.i. block???

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Old 07-23-2009, 01:12 PM
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capri debris
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Default E6 heads on a 255 c.i. block???

I've been searching everywhere and coming up empty.
What I need to know is...

1. Will E6 or E7 heads off a 302 c.i. V8 fit on a 1982 255 c.u. block?
2. Are the cast pistons in a 1982 255 flat top or do they have valve reliefs cut into them?
3. What cams are available for a 255 or will any 302 non roller cam work?

Anyone who can help me out with these questions will be a life saver. Thanks in advance.
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Old 07-23-2009, 02:58 PM
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mjr46
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I think 81 was the only year of the 255 in a fox, I believe there are some differences in the 255 block so I don't believe 302 parts will work..but I'm no expert on the 255
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Old 07-23-2009, 03:10 PM
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capri debris
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Originally Posted by mjr46
I think 81 was the only year of the 255 in a fox, I believe there are some differences in the 255 block so I don't believe 302 parts will work..but I'm no expert on the 255
Positively the 255 was offered in '82. I've gotten tons of info over at FEP so far... posted the same question on 4 different site. I just want to up the hp of this slug a little... not build a screamer, but I want to be sure it'll work before I tear into a perfectly good engine.
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Old 07-23-2009, 03:12 PM
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86 5.0L
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wasnt the 255 just a debored and destroked 302?
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Old 07-24-2009, 10:15 PM
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capri debris
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Still hope more members chime in with help to these questions.
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