Hi room - about to buy an advertised 1957 J2 olds. I am told that the outside carbs are blocked off with plates. Is this for Gas miliage or carb problems, or a phony tri-power put on a lesser camed motor of that year?or? - any help would be greatly appreciated. Also, is there a way I can identify the proper engine combination for this car? I have a 57 olds factory repair manual. Many thanks guys - hope i can help you out with something someday.