4L80E modification help

[Kustom_dude]

I really dig Steve's Shrifter so I had to find a 4L80E.

Now that I have 4L80E It is out a truck its bone stock with less the 30 thousand miles on it. It came with the stock converter.

Now to the million dollar question, what upgrades can I do to it with out having to do a rebuild. Do I get a new torque converter or keep the stock one, shift kit or no shift kit….

Also if any one knows the best place to get a dip stick and such please advise.

Oh ya this thing is super heavy do I need to run big block springs? I have a small block with aluminum heads.

Thanks in advance for the help!!

Kustom_dude