UPDATE!!!
After doing a lot of research with the illustrated parts breakdown on the lift arm (A20602), lift linkage (A20300) and the deck itself, I was convinced the RCK60-30BA would fit on my LX2610. I then called the dealership that has my new LX2610 (waiting on a loader and backhoe) and talked to the lead mechanic and salesman. They both agreed that the RCK60-30BA should work just fine on the LX2610. I then cancelled my order on the the new $3,200 RCK60-30BB (which the dealership was fine with) and went and picked up the used (like brand new) RCK60-30BA. I then had to remove the lift arm and lift linkage from the B2650 that the 30BA came from. Most of this was pretty simple with the exception of:
Lift Linkage Parts:
Arm, Lift 2 LH (K5772-51190)
Arm, Lift 2 RH (K5772-51210)
Shaft, Lift (K5772-51102 Replaces K5772-51100)
Lift Arm Parts
Arm, Lift 1 RH (K5772-61170)
The above parts would not come off because the backhoe frame which runs along the tractor frame and sits on the rear prevented them from being removed without separating the backhoe frame from the tractor frame (No Thanks!) .
Turns out that there is an order that certain things need to be installed. For example: If you order a new LX2610 with a Mid-Mount Mower, Loader, and Backhoe, the loader needs to be installed first because there are certain plates that come with it that the mower deck linkage mounts to. Next, the mower Lift Arm A20602 and Lift Linkage A20300 are installed. Then the backhoe frame.
My thoughts are that if you find an RCK60-30BA from a B2650 tractor and want to mount it on an LX2610, make sure you remove as much of the lift arm and lift linkage as you can. If you just buy the deck, you are going to spend upwards of $1,000 on rest of the parts needed.
I attached a few diagrams below of the major parts I needed to order that I could not remove from the B2650.
I hope this helps and will post updates as they come.
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