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Old 01-25-2002, 12:05 PM
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Question `79 chevy c-10

i have a 1979 chevy c-10. i want to replace the rear end, the engine is a 305 with a few performance parts(cam, heads, intake).
does anyone have any suggestions on a rear end?

reggiesr :o

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Old 02-04-2002, 01:09 AM
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Actually there's nothing wrong with using the exsisting rear end. GM rear ends (10 or 12 bolt)are very strong and take less horsepower to turn than the other brands out there. It would be recommend to ugrade to positract(NOT A MINI SPOOL)and a lower gear---3:70-3:90-4:10. Every parts retailer and all the mail order suppliers have the parts for these rear ends, plus if can't find a local mechanic to install the parts,there has been several articles in recent issues of Hot Rod,Truck'in and others about "doing-it-yourself"-----isn't that what Hot Rodding is all about?
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Old 02-05-2002, 03:25 PM
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The rear end that you have is a good one. You need to calculate what RPM's you want to have and mileage you will accept then determine the gear ratio. Most of the truck rear ends were fairly high numeric ratio's in the first place and it woudln't surpise me to know that you already have a 3.5:1 gear in there now, particularly if it had the small v8 in the first place. So a good place to start is to pull the front cover and look at the ratio which is stamped on the ring gear. Knowing your tire size, the ratio you want and your final drive ratio (1:1 if it isn't an overdrive) you can calculate your rpm's at various speeds. If your gears aren't badly scarred, you may be able to reset the clearances and use them if they are making noise now, but if not reusaeable, the junk yards are full of those rearends and you can get the center section for about $35. It is a good idea to use a posi, particularly if you towing or live in a snow area.
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