you could also raise the front suspension as high as possible and stiffen it up as much as possible, and also lower the rear as much as possible and soften it too. someone probably already said this but i guess i will just reinforce it.
Onroads won't pop wheelies so forget about it. The only way they lift off the ground is when they get enough speed and a lot of air going under the chassis. I've only seen it happened to the 8th scale onroads though.
Trying to live every day like its the last....