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Old 01-21-2009, 10:31 AM
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350 4bolt main question

I just purchased a 350 4bolt main short block last week, and I would like to install the elderbrock head combo kit w/ a roller camshaft. I am going to have the block machined and balanced, but my question is, can I still use stock pistons and rings?

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Old 01-21-2009, 11:02 AM
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You can still use the stock pistons & rings if the block HAS NOT been bored.
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Old 01-21-2009, 12:14 PM
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if you dont bore it use em but if the heads are off the block look for a ring groove if you can feel with the tip of your finger i would go ahead an bore it so it will clean up real good if you plan on keepin it for a long time doit onetime doit right
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Old 01-21-2009, 03:34 PM
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How many miles are on the shortblock?

If it has low miles and the cylinders appear to be in good condition don't bother messing with the shortblock at all.(well i would have it decked if necessary).


If you are going to tear into or are assembling it yourself why would you even bother with using stock wore out rings? If the cylinders are within specs under .004 taper(less is better) and .004-.008 piston to cylinder wall clearance, with under .003 out of round(again less is better), and there is no bad gouges or grooves(unlikely). Then have the cylinders deglaze honed and use new rings. they're cheap, but don't go with cast top rings, you'll want to use chrome or moly face top rings. And if you can afford to, use gapless rings.

If there is a ring ridge on the top of the cylinder don't worry, you can have that removed at the machine shop or do it yourself with the proper tool.

What exactly are you trying to have machined on this engine anyway? I would have it zero decked and use an .041 head gasket.

Is it a factory roller cam equipped engine?
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Old 01-22-2009, 08:10 AM
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Well to be honest, I have'nt recieved the block yet. It should arrive this Friday. I'm just thinking ahead of time. I think it might be a truck block, and the only condition they reported about the block is that it has a spun rod bearing, show I know i'll probably have the crank turned or replaced.
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Old 01-22-2009, 06:30 PM
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Well, from the sounds of things it's likely gonna need a complete rebuild if it has enough miles on it to spin a rod bearing. Don't waste your time with putting your nice aftermarket topend on some beat to crap bottom end, that is a formula for destruction.
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