Engine Swap Everything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.

Coil Springs

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Old Jul 9, 2010 | 06:06 AM
  #1  
harp_scott's Avatar
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Car: 91 RS
Engine: 350 Carb
Transmission: TH-350
Axle/Gears: Stock 3.23
Coil Springs

Just installed old school carb 350 into 91 RSv6. I have read that I must put V8 springs on. When looking for springs at auto zone or oreilly, I see the same part numbers for v6 and v8 cars of 91. Any Help ???
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Old Jul 9, 2010 | 09:20 AM
  #2  
harp_scott's Avatar
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Joined: Sep 2009
Posts: 12
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Car: 91 RS
Engine: 350 Carb
Transmission: TH-350
Axle/Gears: Stock 3.23
Re: Coil Springs

Anyone??????????????
Help would be appreciated.
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Old Jul 9, 2010 | 09:30 AM
  #3  
JamesC's Avatar
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Coil Springs

Many members swap in IROC style springs. If that should be a consideration, since I'm unsure about V6/V8 parts numbers, you might do a search on Moog 5662 and 5665.

JamesC
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Old Jul 9, 2010 | 12:32 PM
  #4  
five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
My experience going from V6/auto/AC to V8/auto/AC was the V6 springs bottomed out easily in dips, over speed bumps, etc., even though the PO had put all new springs in the car before I bought it. When I put in the old V8 front springs from the donor car, the problem went away (the V6 springs are in the LS1/T56 car now and work fine in it).

Other members have said they didn't have any problems with the V6 springs after the V8 swap. Many of those, though, don't have AC or auto tranny.

So, I wouldn't go so far as calling it a "must", but at least it's a "might".
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