rear axle housing width

Can somebody tell me the if the the rear axle housing width is different between the 64-65s and later years? If so what are the widths?

thanks

Ron

Ron the width between the axles on 64 thru 66 is 60 3/4" and it maybe so for 67 also. I do know or have heard from people that know in 68 they went a inch wider..

So yes 64 to I believe 67 is 1" or so less in width than 68 up GM also not just Poncho

Eric