The bolting holes on the top and the total height are the dimensional same. This shall not be no problem to use. The longer length of 3 mm shall not be the problem too. If you are worry, please ask your customer again if there is available space for the 3 mm more length. Also you should ask them if there is the lubrication adapter in front, shall it be enough space for this adapter too.
We have enough stock for 8 pieces too. Thank you.