The 30,000 engine I just put in is also an 83 engine. It just has the 2nd gen trans. I am using the same carbs, but I used the igniters that were in the 30,000 engine. I know I will feel a big difference with the gearing, but I am using a V-max final drive on both and 1st gear is about identical. The old engine just came on so much stronger that it is like it had V-Max cams too. I got the bike almost 19 years ago with 23,000 miles on it. I don't know the history of the bike before I got it, but it did have a lot of add ons that were not stock.
RandyA