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408 5.3?

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Old Jul 2, 2013 | 08:29 PM
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From: ARIZONAA
Default 408 5.3?

Can a 4.250 crank be made to work in a 5.3 bored to 3.905 and get a 408 out of it?
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Old Jul 3, 2013 | 09:26 AM
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That's going to be a fairly expensive crank I would think. You would be better off getting a 6.0 block and staying with a 4" crank. Less expensive and more available. I have also seen shops say they really prefer staying with a 4" cranks due to rod angles or something like that.
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Old Jul 3, 2013 | 10:01 AM
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Can a 4.250 crank be made to work in a 5.3 bored to 3.905 and get a 408 out of it?
It can be, wouldn't want it in my car. Can you imagine how much the piston would rock at the bottom of the bore and how much oil you'd burn.

All for what, a savings of a few hundred bux by going with a 5.3 iron block as opposed to a 6.0 iron block.

Do it right the first time. If you want a 408, get an LQ4/9 block.
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Old Jul 3, 2013 | 12:52 PM
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you could do it but is not a good idea the piston would be way out of the bore at BDC. Custom pistons would be a must.

Better off spending $2200 and having the block sleeved and use stocking part # crank rods and pistons

Tim
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Old Jul 3, 2013 | 01:02 PM
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Summit sells a ready to go 6.0 block that is bored and clearanced for stroker for around 750
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