Need to know lug nut size and backspacing

Hey, I just got a 1984 El Dorado Biarritz. I was wondering what the lug nut dimensions are and the backspacing is for the rims. thanks

what do you mean by lugnut dimension? the bolt pattern?

yeah

i do not know, but neither of those figures are very hard to figure out...just measure from the middle of one lugnut to one not next to it...the number should be something like 5x114 (on my car) and yours should be 5x (whatever you measure).

as for he stock backspacing, it is even easier. take and lay the rim face down, and put a piece of tape from one lip of the rim to the other, and make sure that it is pulled tight...or you can use something long and flat, like a yard stick. then measure from the tape (or yardstick) to the mounting aurface of the rim...that is your offset.