if you where to run a Lrp 07 first,
and you figure out the gearing that runs very well,
then you would change the speed control too a Novak GTB,
will the car need to be regeared?
Or go to a Tekin or Quark, ...
Asuming you only swap the speedo, nothing else.
A racecar is only as good as the mechanic who build it.