Thread: 5.5:1 or 6.1:1 High Compression Heads?
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Old 12-18-2017, 01:27 PM   #4
2manycars
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Default Re: 5.5:1 or 6.1:1 High Compression Heads?
I have a 5.5 head on my tudor, with babbitt bearings, and it has done fine so far, at about 12,000 miles.
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