JD2210MAN, I looked into this conversion for my 2210 a while back and it is true, the 2305 is somewhat different from the 2210 in the mechanical lift mechanism. Most of the difference is at the forward end of the horizontal lifting rod. Ours is clevis end engaging the single blade arm on the transverse lifting bar. The 2305 has two blades on this lifting bar and uses a different mechanism to hold the mowing height. If you get on the JD parts website you can find pictures of both systems for comparison.
I believe it would be fairly easy to add a second blade to our lifting bar or convert the 2305’s cylinder to a clevis. My only concern would be the rear mounting of the cylinder in the area of the rear axle. I can’t tell from the pictures or part layouts if everything is similar enough and I haven’t studied an actual 2305 that closely. I’ll be spending the 4th with a friend of mine who runs the JD service shop at a local dealer. I’ll find out if he’s made any installs on a 2305 and get his feedback on making a conversion. I may even see if I can “borrow” a kit to see if a conversion is possible.
John