What are most people running as far as center diff? A diff or solid axle ? Thanks

Solid middle axle. No diff.

I recently picked up one of these, and it understeers quite a bit on corner exit on throttle.

What have people found to overcome this? It looks like the chassis has heap of front caster on account of the amount of kickup in the chassis.

6 degrees hubs will give you a ton of turn in and rotation. I had the same issue also laid the shocks down front and rear