1994 Opti-Spark Late or Early Model Unit?
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From: Conway SC
1994 Opti-Spark Late or Early Model Unit?
I have a 1994 Corvette Coupe and I would like to replace the OEM Opti-Spark unit with a MSD unit but I do not know which MSD Model Unit I should purchase? The late model unit for a 1994 (#83811) or the early model unit for a 1994 (#8381)? My Corvette VIN # indicates it was one of the first 1700 units built in 1994 and this leads me to think I would need the 1994 early model unit #8381 - can anyone tell me at what point in the 1994 production run (VIN #) did GM change the Opti-Spark model? 
Racer
Joined: Oct 2006
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From: Merritt Island Florida
I have a 1994 Corvette Coupe and I would like to replace the OEM Opti-Spark unit with a MSD unit but I do not know which MSD Model Unit I should purchase? The late model unit for a 1994 (#83811) or the early model unit for a 1994 (#8381)? My Corvette VIN # indicates it was one of the first 1700 units built in 1994 and this leads me to think I would need the 1994 early model unit #8381 - can anyone tell me at what point in the 1994 production run (VIN #) did GM change the Opti-Spark model?
Amazing! We have the same name and the same 1994 Corvette Coupe and I just bought a MSD opti for mine as well. Purchased from a supporting vendor here called "ThunderRacing"... I bought the 8381 version as it came with a vent kit. I was told by ThunderRacing that all 1994s take the same opti #8381.
Billy
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From: Mexico Beach FL
In 1994, the aluminum head LT1 engines (Y-body and F-body) got the early Opti-Spark, and the iron head LT1 engines (B-body, I think) got the late (vented) Opti-Spark.
In 1995, they all got the late Opti-Spark.
Tom Piper
In 1995, they all got the late Opti-Spark.
Tom Piper
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From: Conway SC
Amazing! We have the same name and the same 1994 Corvette Coupe and I just bought a MSD opti for mine as well. Purchased from a supporting vendor here called "ThunderRacing"... I bought the 8381 version as it came with a vent kit. I was told by ThunderRacing that all 1994s take the same opti #8381.
Billy
Billy
