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Old December 14th, 2005, 06:43 PM   #1
Captain Ledd
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Default 232/258 Crank ID?

I'm building a 4.5L stroker next semester for a engine machining class. I have what I think to be a 258 but I'm not shure (kinda measured while in the block, want to make absolutely certain). Is there some sort of casting # on the crank that tells me the difference? or other means of identification? There isn't much of the engine left so a # on the block or crank is about all I have to go on.

As a side question, anyone know the valve diameters int/exh? and the overall valve height? Stem size? etc. 1988 Commanche 4.0L non-HO.
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Old December 14th, 2005, 06:52 PM   #2
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1975-79 258 4.2L 1/2" Head bolts

Blocks: 3227445 and 3224098
Head: 3227258
Crank: 3214723

1980 258 4.2L 1/2" Head bolts

Block: 3235077
Head: 3227258
Crank: 3214723

1981-85 258 4.2L 7/16" Head bolts

Block: 3235444
Heads: 3933000, 3224480, and 3241656
Crank: 3235477

1986 258 4.2L 1/2" Head bolts

Block: 3227444
Head: 3933002
Crank: 3235477
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Old December 14th, 2005, 07:02 PM   #3
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TY CC!

*Edit: Found the valve head Dia's, 1.91 INT / 1.50 EXH. Any of the other valve dimentions available?

Last edited by Captain Ledd; December 14th, 2005 at 08:03 PM.
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