Thread: 425?
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Old July 3rd, 2009, 08:13 AM   #15 (permalink)
88 coupe
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Location: Southern CA
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Originally Posted by bullet1 View Post
........ i would probably tear down and check out anyways ........
That is always the first step.

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Originally Posted by bullet1 View Post
........ im sure this would be a full rebuild ........
No way to know,until the "first step" is complete.


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Originally Posted by bullet1 View Post
........ sounds like the 425 crank is the one to have ........
Unless one is "building" a full race (Serious racing) engine, the only difference is the strokes. If one is "building" a full race engine, an aftermarket crankshaft would be a better choice.

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Originally Posted by bullet1 View Post
........ will the c heads fit on the 425? ........
Yes. They are not much different than the A or B heads that came on the the earlier 425. If the block is machined for 45° lifters, the pushrod holes must be enlarged for clearance.

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Originally Posted by bullet1 View Post
........ the 425 seems to be the one that revs a little quicker ........
Since I have been on the internet, I have seen that posted. Possibly accurate, as long as it is in neutral or park. But if, with all other factors being the same, both were accelerating, how could a 425 "rev faster" than a 455?

Norm
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None of us can know what we haven't learned yet .....
........ I saw Norm's "helpful" answer and encouragement as a slam ........
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