Conversions & Swaps LSX Engines in Non-LSX Vehicles
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th400 behind a ls1

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Old Mar 9, 2006 | 04:30 PM
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Default th400 behind a ls1

What is needed to run a ls1 with a th400? I have tried searching and not found any good info. This is going in a prostreet 67 firebird with a 427 C5R Block and C5R Heads. What am I going to need to make this a consistant setup?
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Old Mar 9, 2006 | 04:46 PM
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uh not too much just a converter for it and it bolts straight up with the exception of one bolt and also a lokar dip stick. A M6 tune if your still using the stock computer but for some reason I doubt it.


Originally Posted by Z06kern
What is needed to run a ls1 with a th400? I have tried searching and not found any good info. This is going in a prostreet 67 firebird with a 427 C5R Block and C5R Heads. What am I going to need to make this a consistant setup?
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Old Mar 9, 2006 | 11:21 PM
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would everything be the same with an LQ9???
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Old Mar 10, 2006 | 08:20 AM
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To the best of my knowledge 6.0 L mate up the same as 5.7,5.3, and 4.8's

Originally Posted by slow6.0
would everything be the same with an LQ9???
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Old Mar 10, 2006 | 06:01 PM
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ok i just went through this. lq9's have 2 different flanges on crank 1 is thinner than the other. i had the the thick one and with that flange and a dual bolt pattern sfi flexplate a th400 converter. everything bolts right up. if you have the thinner flange then your going to need an adapter (basically a $100 spacer and maybe drill the flexplate (hughes has all the stuff)
feel free to correct me if im wrong, but it took me a whole day and alot of runnung around just to get back to where i was
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Old Mar 12, 2006 | 11:34 AM
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you'll need the pilot hole bushing/spacer for the crank. its like a $30 part.
do a search on here and you should be able to find a part # from GM.
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Old Mar 12, 2006 | 12:39 PM
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Originally Posted by pwrtrip75
you'll need the pilot hole bushing/spacer for the crank. its like a $30 part.
do a search on here and you should be able to find a part # from GM.
12563532
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Old Mar 13, 2006 | 08:32 AM
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Your buying a converter for it they will build it accordingly. At least California performance transmissons did formerly art carr. Just tell them what you have. See if they can build it accordingly.

Originally Posted by 01PewterWS6
12563532
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Old Mar 13, 2006 | 06:23 PM
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Originally Posted by ESR
Your buying a converter for it they will build it accordingly. At least California performance transmissons did formerly art carr. Just tell them what you have. See if they can build it accordingly.
Yep, but if you have a sbc one lying around, or can score one cheap id rather do that...

But if you are ordering one, it would make more sense to have it setup for you..
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Old Mar 27, 2006 | 09:28 PM
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any alternative for the 6.00 bolts?
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