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I was getting ready to throw these in the garbage but thought I'd see if there was any interest first. I converted mine to the TorqHead 24X ignition and have no need for these. I'm not selling, but if someone wants to tinker with them shoot me a PM and cover shipping. The MSD unit appears to have seen the most use, the other two were both previously installed. All are from 1997 LT1's, I know one is new, but the previous owner couldn't get the car started, but... she's alive now! Hit me up if you want to tinker with them. If not, I'll be throwing them out shortly. Thanks.
~Tim
Well shoot, you're putting my knowledge of these OPTI's on display...LOL! Yes, the MSD unit is a spline drive, obviously not from a 1997, sorry about that; I just removed them. I know one is brand new (not MSD) it was installed but never successfully started. The car had several other wiring issues. The other one was installed on a running 1996 Firebird TA that I personally drove. I couldn't tell you which one is which at this point. The MSD OPTI came on a spare engine I bought for parts. I needed a crank, heads, lifter spider assy, oil pan, etc.
If you're still interested, happy to hook you up.
~Tim
Updating this to OPTI X5. I found two more in my storage shed! I will not guarantee condition, but if you want to take these off my hands to tinker with, I'm willing to ship them to you if you cover shipping. I'm going to give this until OCT 15th, then I'm tossing them all in the trash. I have no need for them. The two on the left are the earlier spline drive, the three on the right are from 96-97 I believe. If interested, cover shipping and they're yours.
~Tim
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OPTI Spark X3 
