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Need help on the real price 408 block! PLEASE!!!

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Old Jan 12, 2009 | 08:06 PM
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Default Need help on the real price 408 block! PLEASE!!!

I can get a 408 short block for around 3000 with forged rods and pistons. What else is added to the cost of trying to build this block. Right now I have an ls1 with 25,000 miles. Can some stuff from my ls1 be transfered to the 408 so I can save some cost? I just need the real price of building a motor please.
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Old Jan 12, 2009 | 11:06 PM
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Depends on how much you want to spend on heads as far as major additional expense.

Some other stuff that is required would be ls2 conversion kit, proper valve train (lifters, trays, pushrods, etc...).

Which crankshaft are you going to use? What studs? Timing Chain? Oil Pump?

Are you going to install it all or get a shop to do it?
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Old Jan 12, 2009 | 11:52 PM
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It comes with a stock crank and probably going with l92 heads and l76 intake. All the other stuff I dont know but I just need an estimate on how much its going to cost. HOw much is the ls2 conversion kit?
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Old Jan 13, 2009 | 11:20 AM
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If your going with an lq9 6.0 bock you wont need a LS2 conversion kit.
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Old Jan 14, 2009 | 08:51 AM
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Originally Posted by Jsak
I can get a 408 short block for around 3000 with forged rods and pistons. What else is added to the cost of trying to build this block. Right now I have an ls1 with 25,000 miles. Can some stuff from my ls1 be transfered to the 408 so I can save some cost? I just need the real price of building a motor please.

Man, there is NO way to get a REAl cost. Just when you think you have it, it ends up costing more. ALWAYS DOES!! What year block do you have (the 408?) If it is still teh 24 tooth, everything from your LS1 will work/interchangeable.
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Old Jan 14, 2009 | 09:59 AM
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First off, if it has a stock crank it is going to be a 364 to 370 c.i. depending on the actual bore size. You would need a 4" stroke crank to get into the 402-408 c.i. range.

What are you looking to bring over to the new motor from your LS1? Are you wanting to put in new heads/cam or are you wanting to carry your existing combo over? All of your covers, oil pan, intake, valve covers, etc. will all carry over.

Why are you looking for an LS2 conversion kit? Is the block iron or aluminum and what year is it?

Give us some more info. on what you are wanting to do and we'll get you fixed up with everything you need!

Thanks!
Jon
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Old Jan 14, 2009 | 02:41 PM
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Originally Posted by Jsak
I can get a 408 short block for around 3000 with forged rods and pistons. What else is added to the cost of trying to build this block. Right now I have an ls1 with 25,000 miles. Can some stuff from my ls1 be transfered to the 408 so I can save some cost? I just need the real price of building a motor please.
Can some stuff from my ls1 be transfered to the 408 so I can save some cost?
Yes. You can swap the covers and heads, intake right over its a direct swap. You'll need some gaskets obviously but it will accept all your LS1 "stuff" You'll probably want injectors and add the cost of a tune in there and maybe a cam to go with it too To maximize the 408 you'll want different heads and intake and maybe some 1 7/8 headers as well in the future.
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