like add an actual tach output (there is no tach signal on any Gen V harness). We used one of these on a crate LT1 swap in a 1971 Buick GS and it is pretty amazing. You get OE-quality and fitment ...

We have found LT1 Swap (lt1swap.com ... aftermarket electronic speedometer and an engine rpm signal that can run a tachometer. Plus, today there are tablet apps that can read the OBD-II port ...

The LT1 and LS1 fourth-gen Camaro is essentially the same car. While there is certainly some truth to that, the differences can come back to bite you when you attempt to swap an LS of any sort ...