Putting 2007 deck on 2001 721D

I own a 2001 721d with a 2001 "9561" 61" deck. I've beat the 2001 deck up pretty bad and it needs a lot of work to go back to work.
I recently bought a 2007 727k2 with a 2007 "3461" 61" deck and I put that deck on my old 721d.
I have a couple of issues and not sure how to overcome these issues, any help is appreciated.

First off, the 727K2 engine is junk, so using the newer mower is not an option at this time.
The 2007 deck fit right on but adjustments were needed.

I am having two problems that I need to address.
1. To raise the deck, it has the manual lift lever, I have to use both hands to pull it up.
2. Sometimes, the left side scalps the ground. I've adjusted the lift linkage tubes to get a level cut most if the time. This seems to happen if I am on a slight slope.

I had to put the deck lift straps from the 727 on the 721 and that worked ok.
Now I am thinking I should change the traction springs, maybe this will help raise the deck. Might even put the powerfold option on.

I want to apologize if this has already been answered. I haven't figured out your search yet. And thank you for any help that yuou can provide.

Putting 2007 deck on 2001 721D