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Old 08-28-2011, 07:22 AM
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chevy 350?

Hey guys not really a hot rod question but I think you guys would know the best. Im looking at getting a c1500 truck that I would like to lift it and the motor has some miles on it so i was thinking of getting a 350 motor and rebuild it.

My question is which 350 is better? I know very little about chevy Im a Ford guy slowly going to the dark side LOL.

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Old 08-28-2011, 07:36 AM
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I would look for a '88 to '95 engine. They have factory roller cam provisions and the better one piece rear seal. The truck engines may not have roller lifters and cam but most have the needed stuff to upgrade to rollers. It is cheaper than a roller cam retrofit. I am sure more educated people will chime in also.
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Old 08-28-2011, 04:57 PM
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The later generation 350 engines also have a camshaft thrust plate that prevents the cam from flying out of the engine.

The downside is: The newer generation engines are made of lighter castings that will wear out quicker and the heads were designed for increased fuel efficiency and reduced emissions. You can either find older heads for the block, buy new vortecs, or just live with less HP.



Enjoy.
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Old 08-28-2011, 08:11 PM
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" a camshaft thrust plate that prevents the cam from flying out of the engine"

I haven't seen a camshaft fly out of a small block Chevy in my 45 years of engine building. Exception being, if it, in part, is being coaxed out by a flying rod and/or piston assembly
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Old 08-28-2011, 10:49 PM
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"The questionable 350"

Yes there are different 350's with different horses. But from what im dealing with and what you have are almost the same. My van is a g 1500, almost like yours. my van is 5400lbs. I rebuilt my engine that was in it. But it was a 290hp. 350!!! To me thats great for a Camero, or an S-10., but not this van. But the good news is you can bore it bigger to may be about 350/350. Thats a 350hp. 350 0r even bigger small block, like a 383. Thats what i should have put in. A rebuilt 383 has 405hp. or a ZZ-383 has 425hp. but comes at a price and some mods. BUT I could settle with 350/350! I think you could too. Bore it and stroke the one you got!!!
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Old 08-29-2011, 06:18 PM
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Older blocks are limited by relatively low-flowing stock heads, and with non-roller blocks you have to worry about getting the right oil to limit the wear with a flat tappet cam if you go for higher performance grinds.

I think the best starting point in a stock block is a mid-90's roller-cam 350 block with Vortec heads. Its not a great performer in stock form, but the roller block gives you better cam reliability and the ability to easily swap to a more aggressive cam, and the Vortec heads are very good basis for a performance build on a budget.

Bruce
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Old 08-29-2011, 06:53 PM
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Quote:
Originally Posted by jason777
The later generation 350 engines also have a camshaft thrust plate that prevents the cam from flying out of the engine.

The downside is: The newer generation engines are made of lighter castings that will wear out quicker and the heads were designed for increased fuel efficiency and reduced emissions. You can either find older heads for the block, buy new vortecs, or just live with less HP.



Enjoy.
What's to enjoy? More bad "info"?

wicat3, the '96-up L31 Vortec roller cam engine is the new "go to" long block. Cheap and readily available.

The L31 Vortec heads are so superior to the earlier castings- ANY of them- as to be in a different class altogether.

Any 350 cid SBC engine needs to be carefully checked for cylinder wall thickness if an overbore greater than 0.030" is being considered.
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