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Old 05-01-2000, 01:47 PM
Tomo Tomo is offline
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Location: Franklinville, NJ
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What is the lowest ratio I can swap into my stock 10 bolt housing? It presently has a 3.23 - 1. I'm about to put a fresh 40 over
455 in. The car has a wide ratio muncie.
thanks for any advice.

  #2  
Old 05-01-2000, 01:47 PM
Tomo Tomo is offline
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What is the lowest ratio I can swap into my stock 10 bolt housing? It presently has a 3.23 - 1. I'm about to put a fresh 40 over
455 in. The car has a wide ratio muncie.
thanks for any advice.

  #3  
Old 05-10-2000, 10:56 AM
Glenn Glenn is offline
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In '65, the 3.55 rear end was the standard ratio with the wide ratio transmission (3.23 with a/c). I broke my 3.55 in a race and replaced it with 3.90's. With the wide ratio trans, I would not try to go any lower. My gas miles dropped, but my 1/4 mile times improved by about .20 seconds. I think that is lowest ratio that your rear-end will allow.

  #4  
Old 05-10-2000, 12:42 PM
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Old Man Taylor Old Man Taylor is offline
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You cannot go as low as a 3.90 without using a ring gear spacer. Why not stick with your 3.23 and see how you like it? Unless you want to optimize quarter mile performance, the 455 will like a ratio between 3.23 and 3.73.

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Jim

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Old 05-23-2000, 11:59 AM
Tomo Tomo is offline
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Thanks for the info, guys
tom

  #6  
Old 05-23-2000, 01:16 PM
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Ccass Ccass is offline
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I agree with the "Old Man". When Pontiac intro'd the 455 in 70' the gears went to 323 for a 4sp. and 308 w/ac because of all the torque. You might already have the perfect setup.

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