Thinking about a speed run car

[Metallover]

It seems to me like there are 4 types of rc. You have racers, bashers, "blingers"(all aluminum), and speed runners. I did some speed runs with my little micro t and I want to go up a little bigger in scale. I want to keeps costs down, so I'll probably go for an 18th scale or 10th scale touring car on 4s lipo. Dont really have a goal, but 60-75mph would be sweet.

I want something with good diffs and a strong drivetrain. Off the top of my head, a mini T seems like a good, cheap platform. Can I get some recommendations for a speed car 18th scale or 10th scale touring?