Check out the Tamiya TA06, it has a lot of rear weight bias when running the front shocks cantilevered laid down. It also has direct drive to the rear diff. reviewers have reported this combination of rear bias and direct rear drive produces hard launches. It also has a single belt to the front diff. top end is not as strong as the launch, maybe due to the long single belt.
you have an option of running front shocks cantilevered or the up right position.
The cantilevered position will allow you to run a low profile body. Tamiya offers a slammed NSX body that is designed to take advantage of the cantilevered shock position.
Perhaps there are ways to give it more top end, such as adding a belt guide tensioner, and/or low friction belts.
If you want a more conventional belt drive car, check out the Associated TC6. Built to last and parts are available everywhere!
If you run in the the stock class, 17.5 blinky 2s, then a shaft drive will be more efficient and you wont get torque steer with the 17.5 motor and 2s battery. Find a Associated TC3 roller. there still around and very durable.
hope this helps
RC10B5, Tekno 410 sct, TA05 v2 Reedy 17.5, Revolt 30, Seaport Tug, Axial SCX10 Rubicon ess sound system.