I would have to agree with Crash on this one. There are very good reasons why you have not been able to buy a production car or truck with a carb on it for over 20 years. To me, it's like suggesting also going back to a distributor with points to go along with the carb. EFI does not go out of tune.....ever! If it doesn't run right, it means that a sensor has stopped working or something is mechanically broken or wrong with the engine. If you stick with the straight-up EFI crate engine (like the LS376), and buy the ECU to match, there should be no tuning needed anyway. It should be a plug & play.