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I have a 99 with a stock LS1. I was wondering if the coil packs are the same as the LS2, LS3, LS6 and LS7. Do they all mount the same on the Corvette?
I think it works out like this:
Center bolt LS1 and LS6 are plug compatible, but some of the coils are different. e.g. car, truck. Some of the coils have a different bolt pattern where the coil bolts to the bracket. The bolt pattern where the bracket bolts to the valve cover is the same.
LS2 is plug compatible with LS1/6 but uses a different bracket to mount the coils to the valve cover.