I have the BX25D, which is (I believe) the BX2370 with the
BT602 backhoe.
I have 23 HP compared to your 17. That's a pretty significant difference. You're right at 75% of the engine power.
My
hydraulic specs are:
Type: open center
Capacity: 3.1 gal
Pump flow: 6.2 gpm
If you are much less than that, I'd think long and hard about spending that money.
The other concern is the mounting points. I have no idea what you have, but mine are pretty beefy. It's not a 3PH mount. It's right to the frame.
Plumbing might take some work, but that's probably a lot easier than the mounting points.
All that said, I sure love my little backhoe. I have done a ton of work with it. It's much more than paid for itself. It's no professional backhoe, but it gets a lot done.
For example, I was digging a trench and hit the root of an old sycamore I had cut down. I ground the stump just below the surface a few years before digging the trench, but that root just laughed at my BX backhoe. I could barely wiggle it.
I knew i had several more stumps to go through on that trench, so I rented a John Deer 310. It was the backhoe's turn to laugh. It ripped that sycamore out of there in maybe 10 minutes. I had so much fun I went after another stump across the yard. Both of these sycamores were better than 36" at the cut.
The BX simply would never have been able to get them out.