Im working on a swap for my late year 99 Silverado with a 5.3l to a crate 6.2l from Chevrolet. They say they can supply a ECM that will run the engine and the transmission but I'm out of luck using it to run my gages. How can I make my stock gages work? I've thought of using their ECM just for the engine and transmission and running the stock ECM for the gages but haven't a clue as to how to do that. Is there an easier way?