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383 or 454 LSX in 70 chevelle

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Old 10-11-2011, 10:27 PM
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Default 383 or 454 LSX in 70 chevelle

Recently cracked the block on my 383(bad mechanic) in my 70 chevelle ss clone. been debating nonstop weather to just replace the 383 to save some cash on parts or go ***** to the wall and give her the 454LSX she deserves. currently have a T350 tranny, 4:10 gears. would most likely get a TH400.
I have about $16k saved up. Think this would this be enough to get the LSX and tranny and have them installed?

Appreciate the help

Joshua 1:9
Old 10-11-2011, 10:37 PM
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You can build an amazing LSX for half that, and put the rest into something else. In all honesty, I spent about 8k building up the engine in my old school Firebird, and wish I had spent the money on an LSx instead.
Is the 383 a Gen 3 block or an old school mouse motor with a stroker crank?
Old 10-11-2011, 10:45 PM
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here is the current build
Attached Thumbnails 383 or 454 LSX in 70 chevelle-photo-1.jpg  
Old 10-11-2011, 10:52 PM
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I like old engines in old cars, so I wouldn't do any LSx in a Chevelle. But I also wouldn't do an SBC in a Chevelle-sized car, I'd go with a 502ci crate or custom built BBC. Just my preference though.
Old 10-11-2011, 10:56 PM
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thats why i want a 454. I want to keep the engine size classic, but new age with the LSX
Old 10-11-2011, 11:10 PM
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Originally Posted by russthebus
thats why i want a 454. I want to keep the engine size classic, but new age with the LSX
If new age is your thing, then by all means go for it!

Personally, I like old tech in my old cars, and new tech in my new(er) cars. You can build huge power either way, so pick whichever you prefer. It's just a matter of preference.

If you choose to move forward with the LSx conversion, check out our conversion and hybrids section for details from many members that have done this swap into A-bodies like yours.
Old 10-12-2011, 12:25 AM
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I'd do the LSX 454. I want to build one eventually.
Old 10-12-2011, 03:33 AM
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You wouldn't regret a 454, just make sure you have everything built behind it to withstand the abuse.
Old 10-12-2011, 04:11 AM
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yeah 454 lsx, that would be bad *** for sure, how much do the 454s run i think its around 10 grand correct?
Old 10-12-2011, 04:44 AM
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A friend of mine was debating whether to get C or D sized breast implants. I told her, "why go through the expense and pain of going with the C's, just so later down the road you could question whether you should've gone bigger or not and have to go through the pain and money again to get it right? Go all out the first time!"

My advice to you is the same-if you were content with the 383 you'd never think about the 454; get the 454 even though it may take longer and cost more-but in the end you, like my friend, won't have to worry about whether you went big enough or not...
Old 10-12-2011, 11:02 AM
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Originally Posted by myk
A friend of mine was debating whether to get C or D sized breast implants. I told her, "why go through the expense and pain of going with the C's, just so later down the road you could question whether you should've gone bigger or not and have to go through the pain and money again to get it right? Go all out the first time!"

My advice to you is the same-if you were content with the 383 you'd never think about the 454; get the 454 even though it may take longer and cost more-but in the end you, like my friend, won't have to worry about whether you went big enough or not...

Old 10-12-2011, 11:37 AM
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454!!
Old 10-12-2011, 11:41 AM
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500 ci lsx ftw
Old 10-12-2011, 12:06 PM
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454 BBC makes more power, and costs a lot less.
Old 10-12-2011, 12:42 PM
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thanks for all the advice. I do want the 454 LSX, was just wondering if the $16k would cover everything. 10k for engine few more for tranny, lots of misc stuff i am sure i would need too, installation
Old 10-12-2011, 01:02 PM
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Im willing to bet youll spend close to 13k-14k on just the motor alone..depending on what setup you go with. Carbed is cheaper than efi but both are going to cost you..quick general breakdown.

EFI
Engine -9500
Injectors - 350-400
Wiring - 500-1600
Intake -300-800
Throttle body - 100-500
Fuel rails - 50-200
Front accessories - 700
Headers - 400-1200
Oil pan - 300-500
Adapters - 50-100
Coil packs /wiring - 150-200

Im sure there are other things Im forgetting but you get the idea.

Carbed

EFI
Engine -9500
msd controller - 300-400
Intake -300-600
Carb - 500-1500
Front accessories - 700
Headers - 400-1200
Oil pan - 300-500
Adapters - 50-100
Coil packs /wiring - 150-200

Hope that helps as Im in that boat now...the gm crate motor needs almost everything. Good luck
Old 10-12-2011, 01:10 PM
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thanks awesome breakdown. Carbed for sure, guessing pretty much everything from my 383 wouldnt work either correct?
Old 10-12-2011, 04:25 PM
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ima c cup guy so... 383
Old 10-12-2011, 05:16 PM
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Originally Posted by LeanPocket
ima c cup guy so... 383
would you wana buy a c cup built 383?
Old 10-12-2011, 05:36 PM
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genI 383 vs. 454lsx is more like, saggy 50yr old C-cups vs. perky 21yr old D-cups. if you've got the cash I say go for it.


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