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55 Chevy truck- Lt1-m21

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Old 09-06-2005, 07:14 AM
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Default 55 Chevy truck- Lt1-m21

just starting my project.using lt1 from 94 caprice.does anyone see any problems switching to M21 4SPEED FROM ORIGINAL AUTO?Wanted to stay old school but if too much hassle will stick with auto trans.
Old 09-06-2005, 08:57 AM
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do they actually make a bell housing or adapter to make that fit? i would go the retro route and just use a t56. it might make it a bit easier.
Old 09-06-2005, 09:58 AM
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I know nothing about M21s, but I love the 55-59 body style. Post some pics
Old 09-06-2005, 10:26 AM
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Originally Posted by 4u 2 nv
do they actually make a bell housing or adapter to make that fit? i would go the retro route and just use a t56. it might make it a bit easier.
A LT1 uses the same bellousing used on all SBCs since 55. The flywheel did change with the introduction of the 1 piece rear main seal.
Old 09-06-2005, 12:08 PM
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Why not put a T56 behind it? Double overdrive and a transmission that is probably just as strong. Putting an M-21 behind a fuel injected LT1 doesn't make sense to me.....
Old 09-07-2005, 02:37 PM
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Have The M21 Trans. And Bell Housing.wanted To Stick With The Way The. Old Customs Were Set Up With Some The New Ideas,like The Fuel Injection.i Am 55 And A Bit Old Fasioned.have 12 B0lt Out F A69 Elcamino Ss That I Wil Also Be Installing.
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