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Old 11-26-2003, 10:51 AM
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narrowed rear end and gear selection

I am building a tube chassis for a 71 VW bug, which is now complete and I an ready for the rear end. To start with the bug will be powered with a mild small block(300 hp) running through a tubro 350 trans. The rear end is going to have to be narrowed slightly to fit under the 60" wide fenders and drive the 265 tires. I figure on running a ford 9" rear end. My question is where is a good place to get a narrowed ford 9"? Currie? And what gear ratio would be good for haighway and acceleration for a light car? 3.23?

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Old 11-26-2003, 12:54 PM
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Hey Blob.
Since you're building the chassis yourself (I read that in another thread), you should be able to shorten the rear yourself as well. I know it's not that difficult (at least I've heard). That way you would save some money and would only need a set of custom axels set made. As for gears, I would go with a set of 3.89's since it's a tube chassis. They would have some good torque off the line and maintain somewhat of some highway driveability. Goodl luck
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Old 11-26-2003, 01:32 PM
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Another way you can save money is to find a narrow track van or truck with an offset differential, cut the longer side tube to match the shorter side and get an extra short axle from the wreckers or whatever. Depending on the rearend you could shave off 5 to 8'.
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Old 11-26-2003, 05:04 PM
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I'm just asking, but don't you need the offset on 9"ers since the driveline doesn't attach in the middle of the pumpkin?
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Old 11-26-2003, 05:24 PM
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Yes, but............most van rears are offset even more to compensate for the engine offset. 9" Ford housings are easy to narrow, IF, you have a jig. Most people don't narrow enough rears to cough up the $400 or so for the tool. I believe the going rate for narrowing a housing is about $100, but I may be wrong.
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Old 11-26-2003, 05:30 PM
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Not sure about the 9" Ford but just off the top of my head I know Chevy Astro vans are offset for no particular reason I can think of.
I have found that housing are cheap to get narrowed but the spiffy axles you'll need are a fortune, in Canada anyway.
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Old 11-26-2003, 06:09 PM
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RFB, why do you need a jig? I understand that the clearances and bearings and all, but if you cut straight, and place it straight, wouldn't that be good enough?
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Old 11-26-2003, 07:40 PM
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rear width

you need wheels & tires that you are going to use. place under fenders in proper position & measure between flanges. next decide what brakes are going to be used (disc or drum) IT makes a difference. if you wish contact me with measurements and I can spec out proper width.
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