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Original Message
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Please read this slowly and carefully. |
By Royce Peterson - 12/13/2001 6:13:09 PM; IP 64.12.106.53 |
Read this carefully Don:
The 1972 - 1978 390 piston is the 410 piston from 1966-1967 Mercury. They therefore have the same compression height and pin height. They are the same piston. It started life as a 410 piston that gives something like 10 1/2 to 1 compression. In a 390 it results in 8.0 to 1 compression.
Understand?
Royce Peterson |
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