Olds 307 to 400 sbc

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TonyHurstOlds

Not-quite-so-new-guy
Dec 11, 2018
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So I have a 84 hurst olds just blew the engine on it so I have a 400sb I’ve been building, anything special I should know like motor mounts? Or oil pan if so any ideas of where I can get these parts?
 
Nov 4, 2012
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You'll need motor mounts for a SBC, which came in Monte Carlos. Tell the parts counter you have a Monte Carlo with a 305 in it. IIRC Chevy and Olds fuel lines are on the same side so you shouldnt have much trouble there. Chevy and Olds have different bellhousings bolt patterns so you'll either need an adapter or a Chevy transmission.
 

TonyHurstOlds

Not-quite-so-new-guy
Dec 11, 2018
5
3
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Thanks, as far as the transmission goes I’m swapping that too I have a stage 3 700r4 that my brother in-law is giving me
 

TURNA

Rocket Powered Basset Hound
Jul 24, 2009
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84 Hurst should have a 2004r in it so trans should work
 
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TURNA

Rocket Powered Basset Hound
Jul 24, 2009
10,941
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For a 700 u will need to modify the Xmember
 

TonyHurstOlds

Not-quite-so-new-guy
Dec 11, 2018
5
3
3
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565bbchevy

Geezer
Aug 8, 2011
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I was expecting this ^^^ sooner. Even though I am a diehard Chevy guy that is one clean Olds and I would probably want to put a 403 or 455 in there just because.
 
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