37Aman, you're on a good start on your project. Things I would have done a little differently? About everything.

In hindsight, you can always do something better than before, but it really boils down to time, money and personal opinion on how far your willing to go to make a difference. Ok, so enough with the philosophy.... The three things I would have done differently are: 1) paint, 2) exhaust coatings and 3) carb rebuild. 1) My paint "problem" was I went to a auto paint shop that specializes in auto/truck/tractor/whathaveyou painting and supplies and after talking to the owner, was impressed with his PPG paint products. He told me that gauranteed, if I used John Deere paint products, that in 6 months, it'd be turning chalky,etc. Wanted me to use his PPG product (which is good by the way). Anyway, I told him I wanted my paint to be mixed up as JD classic color - after whole tractor was complete, found out that the color was more of the newer agricultural color. I think it's a little lighter color than the classic I was wanting. Now, if I need to do spot repaints, I need to have the exact color mixed up again. Not as simple as going to my JD dealer and getting a can. Also, I would paint 4, 5 or 6 coats on - I only sprayed 2 to 3 - I can see now and from others in my club that more coats is usually better. Mine is already showing through in many areas.
The second part 2) I would change would be instead of painting my exhaust manifolding, I'd get it ceramic coated. Painting wears off soon and the normal rust looks reappears, but ceramic coating lasts far longer and is very reasonably priced (about $30 for manifold and piping. The third part 3) I would concentrate on would be to make sure my carb (and mag) are rebuilt well. I did my own carb - it was the 1st time for me so I probably didn't do everything perfect - and while it ran pretty good, could have been alot better. After about a year of running, I took it to a guy that knows these, and for about $60 + parts it came back as a totally different running machine! Started better, idled ALOT better, etc.
So, again, alot of this is personal preferences, but some areas I would definately consider on my next one.
Keep us posted on your progress!
Greg