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Old 10-24-2005, 06:50 AM
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need some advice please

im working on a chevy350 4bolt main block#3970010.head#3998993. I plan on using a edelbrock cam and lifterkit #2101 .420 .442 @.050 and a edelbrock manifold#2102 with a holly 650. along with a edelbrock 7800 roller timing chain. is this a good set up to start off with? its only needed to burn tires and have some low end touque. not going racing!! i also have brand new 30+flat top pistons. question is should i bother boring this block which is in perfectly fine condition or should i just stick with the old pistons and install new rings on them? i still havent figured out about this boring thing does it give any added hp?

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Old 10-24-2005, 10:02 AM
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I am not sure what manifold that is, but I would think the performer would work the best. I assume you are running stock heads, and also that you meant .420 .442 lift. That being the case, the motor should be good for a cruiser, but not much on the performance end. You would probably be able to add some tire frying ability with a slightly larger cam if your springs will allow it. I would think about something in the 220 @.050 duration range. As far as the pistons go, one big indicator will be if the block has ring ridge or not. If you look at the top of the cylinder and can see a little ledge that the rings have caused, then I would recommend getting the motor rebored. If it is not there, or it is really minimal, you might be able to use your stock pistons. If there is some there I would send it to a machine shop and see what they say. It may be a good idea to send it to it anyway.

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Old 10-24-2005, 10:08 AM
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i'd go ahead and bore it and put the new pistons in. are the rods new too? if your using the old ones have em' magnafluxed 1st. what about the bearings?

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