LT1-LT4 Modifications 1993-97 Gen II Small Block V8

opti question

Old Jan 27, 2007 | 02:25 AM
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ive been looking around for an opti since mine is about to kick the bucket im pretty sure, now im looking on ebay and they say they are only for a 95-97, why arent they fitting a 94? i know they are the same engine just obd1 instead of obd2, would it fit?
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Old Jan 27, 2007 | 02:41 AM
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92 -94 opti's are not vented. I'm also sure the length on the cam pin is different also. 95 and ups are vented but I hear the MSD Opti for 92-94 are vented.
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Old Jan 27, 2007 | 06:08 AM
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so i can get a 92-94 and be all right?
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Old Jan 29, 2007 | 12:54 PM
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Yeah, you need the 92-94 assuming the stock is in place now. The opti shaft is different where it connects to the cam between the 92-94 and 95-97. The older style is non-vented unless you get a complete upgrade version (MSD, Dynaspark) or you can add a MSD cap/rotor to a stock opti to gain the benefits of venting.
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Old Jan 29, 2007 | 01:26 PM
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I have a MSD 92-94 optispark for sale. Brand new
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Old Jan 29, 2007 | 07:14 PM
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95-97 is the vented opti eveything back is non-vented just keep looking!
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Old Jan 29, 2007 | 09:36 PM
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You need the non vented as the timing chain covers are different on the 95-97s.The non vented 92-94 is driven by a small splined shaft and has a small opening on the t-chain cover.The vented 95-97 have a much bigger opening and is driven directly off the cam with a long dowel pin.
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