Guest Posted October 11, 2001 Share Posted October 11, 2001 A friend called tonite, has an engine and trans he pulled a couple of years ago. we don't know how to tell the difference between a 401 and a 425. He says the engine had a rebuild. Can anyone tell ushow to tell what it is? Anybody want one? Link to comment Share on other sites More sharing options...
Steve B Posted October 11, 2001 Share Posted October 11, 2001 Give us the two lettter code on the front valley pan rail from the passenger side. That wii tell us the year and size. Link to comment Share on other sites More sharing options...
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