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Old 12-18-2005, 01:47 AM
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Is there a 350 Big Block?

So this dude is telling be about his 77 Chevy P/U sitting on 46" tires. I was instantly interested, and I asked what he had for gears, he grinned and said "Oh, there just the stockers", I cringed as he lives in a town with steeper hills than San Fran. Then I said you must have one hell of a motor in that rig, and he said "Yeap! 350 BIG block!" I said Big Block 350? He says "yeah most people haven't heard of them"...So the smallest Chevy BB I've heard of is a 366. Is there really a 350 BB? I'm guessing not, but I've been wrong plenty of times before. What were they found in and what would be the advantage of having one, if they exist?

Thanks!

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Old 12-18-2005, 05:43 AM
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There isn`t in the chevy line. There was the early 348 and 409`s, but I`m not sure if they were considered to be big blocks. I`ve always heard of them referred to as "W" engines. I`ve heard "400 big block" as well, but this really refers to the 402 big block chevy.
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Old 12-18-2005, 07:12 AM
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Sounds more like a person that doesnt have a clue. You should have asked to see it. In 77 I had a blazer and it came with a 350 but there was an optional 400 both small blocks. I dont remember if the big block was available in the blazer but I am sure it was in the regular truck.
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Old 12-18-2005, 08:49 AM
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A logical explanation may be the truck was originally a diesel and like most owners when it went south they replaced it with an Olds engine because the 6.2 diesels were Olds blocks and there was a big block 350 Olds, which might also explain the gearing to make those big tires roll?
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Old 12-18-2005, 08:52 AM
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I was going to say Olds too.........Probably is a stock Chevy SB......and probably a real dog on those hills, but he thinks it looks cool.
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Old 12-18-2005, 10:29 AM
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Quote:
Originally Posted by jalopy45
A logical explanation may be the truck was originally a diesel and like most owners when it went south they replaced it with an Olds engine because the 6.2 diesels were Olds blocks and there was a big block 350 Olds, which might also explain the gearing to make those big tires roll?
The 5.7 diesel used an Olds block. The 6.2 and the 6.5 are all Chevy. They aren't an Olds design. They use a Chevy bell housing bolt pattern. Some Olds racers like to use the 350 Olds diesel block instead of a standard 350 gas block.

I have to agree that the guy was probably just saying he had a big block because he thought it was more impressive and he had no clue about engines.
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Old 12-18-2005, 03:48 PM
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big block

i know that in the early 60's chevy had a 305 v-6 that people called a big block v-6.i learned that one day at a parts store i worked at by lookin at different engines on the computer.
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Old 12-18-2005, 06:22 PM
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Quote:
Originally Posted by rebelcowboy50
i know that in the early 60's chevy had a 305 v-6 that people called a big block v-6.i learned that one day at a parts store i worked at by lookin at different engines on the computer.
I have a 68 GMC with a 305 V6.
Quite the machine!!
The first time I saw it I thought it was a 409 because of the shape of the valve covers.
The spark plugs are on the intake side of the head. Interesting engine.
GMC made 4 sizes of this engine - 305, 351, 401 and 478 cid

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Old 12-18-2005, 06:59 PM
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I pretty much figured he was talking out the wrong side, but I had to check. That V6 is pretty sweet!
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Old 12-19-2005, 08:16 AM
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GMC also made a 702 ci v-12 called the twin-six
Looks like they just stuck to of the sixers together!

http://www.6066gmcguy.org/TwinSix.htm
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Old 12-19-2005, 10:13 AM
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v-12s

thats a big *** motor,i think lincoln had a v-12 like a flathead durin the 40's,i saw a rat rod pic a few days ago with one in it.


here is a link to a pic of onehttp://community.webshots.com/photo/...69732198NnJRle

here is some specs on ithttp://www.carnut.com/specs/gen/linc40.html

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Old 12-19-2005, 11:51 AM
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WOW! Never knew about that V-6 or the V-12. Thanks for the info.
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Old 12-19-2005, 12:48 PM
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350 big block or 350 small block....It doesn't matter. 350 cid is only 350 cid. It is not a 350 BBC but maybe a 350 Olds. I feel a 350 Olds will have a little more low rpm torque than a 350 sbc. Those Olds engines were designed to move big cars with tall highway gears. But 46's with stock gearing on a 4x4 is a little much for any engine.

That truck needs more gears (very high 4's or low 5 series).

A 400sbc will run about the same as a 396 bbc. However, a 400 sbc may run a little better now-a-days because of the new sbc heads. But still about the same. For the most part, cubes are cubes when comparing engines on the same technical page.

You don't need a truck with 46's inchers. What you need is a truck lowered 4 to 6 inches. hahahaha
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Old 12-20-2005, 05:51 PM
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Wasn't there a 366 big block Chevy?

Greg
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Old 12-20-2005, 06:01 PM
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Yep, 366 is a small-bore, tall-deck truck block. Pretty much a boat anchor any way you look at it

All evidence points to the fact that the truck has a 350 chevy which is not a big block. The 6.2 was in fact cast with a chevy bellhousing, but it was designed in cooperation with Detroit. Much has been done by detroit to stifle that rumor/fact since the engine was in a lot of ways a flop. But that is beside the point. The 6.2 wasn't offered in 77 and neither was the 350 Olds diesel. The 350 diesel was introduced as an option in 1978 in the trucks until 82??? when the 6.2 replaced it.
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