[cotbu]

That particular trick only works for the KA, Doing it to the sr 62ecu will put your ecu into some kind of limiter...IIRC at like 5500rpm the gradually gets lower to about 3500rpm sucks.

I've heard, never tried the 63ecu. IIRC, it doesn't have the limiter for rev and speed.
The first thing that worked for me was a pivot speed meter X old rare JDM!
Still use it to display my speed in kilometers, 400m traps etc.
I now have a flashed ECU no speed limit or 500kmph

Get an fsm! you can disconnect all the sensor on the tranny except for the VSS it's not going to work like you want it to. VSS disconnected = no speed limit but Rev limit kicks in lower, plus you can't verify the burying of the needle.
HYU.