I run Caltracs - but they took a while to figure out, and it took some tweaks to the pinion angle and shocks to make it work best.

I run drag radials on the street and 29" x 12.5" Hoosier slicks at the track. The drag radials work tons better than normal street tires on the street. I couldn't get them to work at the track. I carry extra ballast on the street to help it hook.

It looks like MS3X all assembled with cables would be about $850 or so. No need for a 2-bar MAP with it since it has a 2.5 BAR built into it.