What year LT1?
Thanks
Matt
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The opti hole large or small and is there a cps sensor mounted on the bottom.
If the opti drive hole is small then it is a 93-94, a 93 has a different intake with the crossover for the fuel at the rear instead of the front. If it has a big hole for the opti but no CPS it is a 95. If it has the big hole and CPS it is a 96-7.
I know the VIN deriative can be used I just don't have the info to decode it.
17094047 0274 KNK 2 (didnt see any other numbers on the manifold, then on the back of the block i think these are the corret numbers but so hard to tell 10125327, then on the other side it had 57L SGI! It is the cat under the exhaust manifold, and will start disasembling it tom so i will look at the timing cover and opti!!


