I am realy considering pulling the Lg4 out of my 87 and putting it into my 88 to use as a daily driver. My only concern is the gas mileage. It will be an Lg4 with performer intake and 600 carb, T5 and 3.42 rear. What might it be around? I also have a 2.73 posi I can put in to help raise it even more. Performance is not a concern with this car.