O.k. i have an 82 r/c small pattern. Just got the 85 r/c big pattern. Want to put the rims off the 85 on my 82.. on rearends can u just swap the axels ?? or do I have to swap the complete rearends? on the front, can u just swap the roters?? I want to make the 82 big pattern & 85 into a small pattern....