The only thing I don't care for is how easily it rolls and that it tends to overheat.
I can do the anti-squat mod y'all talked about but I'm not sure what type of heatsink or where to buy one for the motor. I've also been thinking about drilling a hole or two in the body (its pretty beat up but I don't care about looks) to aid cooling as well.
I also wonder if the "pro-squat" set up is for greater ground clearance/approach angle for jumping.
The truck could use harder front springs in any case and as a side effect this would reduce the tendency to roll. Note that lowering the spring nuts on the shock body does not increase spring rate: these are only for ride height adjustments.
You can also adjust the roll centers with the camber link attachment points, hinge pin pills (Tekno TKR6544 fits), and the hub height in the rear.
Camber link inner attachment down -> roll center goes up. (Opposite direction.)
Hinge pin up -> roll center goes up. (Same direction.)
Adding anti-squat by raising the fronts of the rear hinge pins already raises the roll center as the avg. height between the pin ends goes up.
The stock setup has more droop in the front than the rear. Usually, off road vehicles have more droop in the rear. Limiting the front droop also limits how far it will roll. A 2 mm spacer inside the front shocks is a good basic change and keeps the truck off-roady.
With anti-squat in the rear and harder springs in the front, you can lower the ride height without constant chassis slaps. A lower ride height also reduces body roll. As you can see, every setup change affects something else. It can be a benefit but also a distraction: take notes and don’t make all of the recommended changes at once. (Some changes are better when paired with another change, though.)
Heatsinks and fans are cheap and easily available so I won’t comment on those. Holes in an SCT body will probably do nothing to the operating temps as there’s plenty of airflow underneath already. Buggies with closely fitting bodies have ventilation holes for a reason. SCT bodies are cut to reduce parachuting.
The initial pro-squat is probably just a design oversight that doesn’t matter so much in a basher. Pro-squat reduces ground clearance when you accelerate and doesn’t help jumping to my knowledge. With anti-squat in the rear, you get more traction and ground clearance as you accelerate towards a jump.