Before I begin my first post, please forgive my ignorance and lack of tractor knowledge. I have extensive experience in building dirt bikes, working on vehicles and maintaining an M1A2 SEP Abrams Battle Tank, but that's about as far as it goes

I recently came across what I thought was a good deal on a Lo-Boy 185 for $400. It runs, no smoke and the hydraulics work. The seller told me it had a new clutch, it just needed to be adjusted. It also needed a battery, so I couldn't test drive it there. In my excitement and sheer ignorance of tractors (This is my first one), I took his word for it, we pushed it on to the trailer and I headed home.
When I got it in my shop, I threw a new battery in it and it cranked up after some slow turns. When I attempted to put it in gear, they just grinded.
I went ahead and pulled the shaft cover off and saw that the springs on the pressure plate were depressed, the friction plate was worn and the pucks were melted.
So I went ahead and ordered a new clutch kit and pucks, but I didn't think to measure the clutch size. The clutch I got in the mail is 6.5"
My question is: Will the 6.5" clutch work? I mean, the rear pressure plate is 7"... I know the throwout bearing for the 6.5 won't work but everything else seems like it wouldn't be an issue. To me, it seems like maybe a bigger clutch would be better anyway - like an upgrade.
I hope I didn't get screwed out of 400 bucks, but I like a good project as long as it doesn't become a money pit. If anyone lives near Dallas, I am looking for parts for this thing so I can get it looking and running better.
Thanks,