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Old 04-28-2013, 07:36 PM   #1
sam059
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Big block, small block

Hello, new to thew forum. I am fortunate and actually have a choice, would like some thoughts. I have a 1967 C10 Arizona truck that i am going to restore, frame up. I have a 1971 350 V8 with a turbo 350 transmission, this is my choice. I also have a 1986 454 V8 with a turbo 400, newly rebuilt. I am going to build the small block and use that, truck will be a driver not a sitter. But which transmission? I will use truck to tow boats and medium size trailers. I am thinking turbo 350, 400 is heavier. Anyway, any thoughts?
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Old 04-28-2013, 07:48 PM   #2
vidman
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Re: Big block, small block

I would use the 400 in place of the 350. will last longer when towing... or you could just drop in the 454-400 and all your problems would be solved
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Old 04-28-2013, 09:25 PM   #3
1972RedNeck
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Re: Big block, small block

Definitely the turbo 400. I built up a small block one time. Dad's bone stock 454 vortec would way out pull my sbc. They both got horrible fuel mileage when towing.
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Old 04-28-2013, 09:31 PM   #4
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Re: Big block, small block

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Originally Posted by 1972RedNeck View Post
Definitely the turbo 400. I built up a small block one time. Dad's bone stock 454 vortec would way out pull my sbc. They both got horrible fuel mileage when towing.
yep, they both get poor mileage when working so you might as well have the power. Go big block and turbo 400. However, i would change the 400's first gear from the anemic 2.48-1 ratio to the deeper 2.75. It really helps the truck off the line under load.
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Old 04-29-2013, 01:02 AM   #5
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Re: Big block, small block

Hey sam059 ...

Just wanted to say to the forums and from Ohio.
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Old 04-29-2013, 08:29 AM   #6
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Re: Big block, small block

350 and TH400 trans
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Old 04-30-2013, 12:17 AM   #7
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Re: Big block, small block

Go big block if you have it
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Old 04-30-2013, 12:21 AM   #8
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Re: Big block, small block

Th400
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