I am putting in AMD rear frame caps on my '70 Road Runner because the rear crossmember was toast and the guy who I bought the car from just ignored it. I put in re-located spring shackle reinforced mounts prior to buying the frame caps so I have had to grind them down a bit at the bottom of the original frame so the cap will fit over it. Even when touching the bottom of the original frame the cap is 5/8" lower than the original frame at the very rear. I'll adjust for it on the new rear crossmember. Anybody else have a similar situation?