I did that 8 yrs ago...unlucky for me I threw the old ones out after the repops arrived (they 'looked' good)...and when we installed the new next week, we found bad fit (trash already picked up!...lesson: NEVER, EVER THROW ORIG STUFF OUT! at least not until you got the repop stuff installed! ;))...my buddy (prof restorer) had a h$ll of a time trying to get them to fit right....I`ve left them on , but the fit in the passenger upper corner is still not quite right...but now barely noticeable,after he 'worked them over'....IF you still have the origs , you better fix those ,unless totally rusted thru...