I'm riding a 2000 Lemond Buenos Aires. Like a noob i have my saddle pushed forward to compensate for a long reach to the handlebars. I'm 5'10'' The bike is a 55cm and it really shouldn't be too big for me. I know Lemond makes bikes with longer top tubes so the tube is probably a 55.5.

I feel that If i were to center my saddle rather than having it pushed forward, I would find a better balance on the bike and have an easier time riding long distances which is what i like to do.
I'm currently using a 70mm Stem and have been advised NOT to switch to a 50mm Stem.

In the bikes current set up, when i am comfortable on the hoods, i can see the axle slightly behind the handlebars as I'm looking down. I want to push the saddle back but i'm afraid it will make my reach too far and I can't swap out the stem.

I love my bike...Any suggestions?