So I finally got my truck running on a local outdoor track

It felt good considering it was box stock non FT. I did install a chassis brace, clutch basket and garodiscs. The only thing different is I have 10k in the front diff and 5k in the rear. My only complaints is that the rear was loose no matter what the track conditions were. I knew that after the fact I bought the truck. I also had quite a few traction rolls but I was able to quickly recover from them. I ended up 4th in the Amain and had a great time with it. I do need to turn down my throttle, as I would spin out if I gave it too much.

My main question is diff tuning with these trucks.

1. Are they similar to diff tuning with 8th scales?
2. Will going heavier in the rear help settle it down?
3. What are the next mods I should do to help performance? Or can tuning help a lot?

Thanks in advance for any help or suggestions.