Did big bolts have different dash radio hole size and different radios? i pulled a radio out of a big bolt and when i went to out it in my 1/2ton it didnt fit in my radio hole. The radio i pulled wasnt stock because the lettering and numbers where up side down. But it looked old and i was going to use just for looks.my truck is a 47-53 chevy and the big bolt was the same year period