400 to 350 engine swap questions? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72armyswbtruck · 01-25-2006, 09:02 PM

Hello there,
Can anyone tell me if there are anythings that I need to do differently when swaping out a Chevy 400 BBC to a 350 small block. The original motor also had a 400 tranny and now I am putting in a 350 tranny. Any suggestions.
Thanks

**kwmech** · 01-25-2006, 10:36 PM

Bolt it directly in, engine will be 1'' deeper in the compartment than a factory 350 that's all. You can even use the big block cushions. But an advantage is you can use a serpentine belt setup with the big block shroud you already have. Keep the turbo 400 and you will not have to do any driveline modifications

72armyswbtruck · 01-26-2006, 01:03 AM

Thanks, Sounds great I will let you know how it goes sometime?, pulling the 350 this weekend, maybe dropping it in this weekend to. Thanks again

01-25-2006, 09:02 PM	#1
72armyswbtruck Registered User Join Date: Feb 2004 Location: Idaho Posts: 4,033	400 to 350 engine swap questions? Hello there, Can anyone tell me if there are anythings that I need to do differently when swaping out a Chevy 400 BBC to a 350 small block. The original motor also had a 400 tranny and now I am putting in a 350 tranny. Any suggestions. Thanks

01-25-2006, 10:36 PM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,720	Re: 400 to 350 engine swap questions? Bolt it directly in, engine will be 1'' deeper in the compartment than a factory 350 that's all. You can even use the big block cushions. But an advantage is you can use a serpentine belt setup with the big block shroud you already have. Keep the turbo 400 and you will not have to do any driveline modifications Last edited by kwmech; 01-25-2006 at 10:37 PM.

01-26-2006, 01:03 AM	#3
72armyswbtruck Registered User Join Date: Feb 2004 Location: Idaho Posts: 4,033	Re: 400 to 350 engine swap questions? Thanks, Sounds great I will let you know how it goes sometime?, pulling the 350 this weekend, maybe dropping it in this weekend to. Thanks again



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