One of the most useless things on a Hilux is the handbrake, so this is how I have solved the problem.
I have fitted Subaru front 18mm caliphers with the self adjusting handbrake on to vented hilux front discs.

Others have done this and tried to use the handbrake on the dash. This does not work properly and you still don't have good handbrake.
Instead I have moved the Handbrake lever to the Centre. I have used a Landcruiser Lever that seems to have the right gearing.

I then modified the body to bring the 2 cables inside the truck by the rear seat. This is good because no way can mud and dust get in the cable from this end.
I then went to the wreckers and found an equalizer that would work. This connects to a 6mm threaded rod that goes to the lever.

I then cut up a peice of plastic sewer pipe and using a heat gun shaped it to to fit the body and cover the linkage.The little cover on top is to get to the adjusting nuts.

This is the finished article with a small console on top.

My brakes are miles better than what is needed for certification. For cert. a truck has to go to a 100k and back to 0 three times under in under 2 minutes with a max braking of 4.4 secs.
My truck does the three runs in 1min 10 secs with each braking improving and that is the important thing because it shows I have not got brake fade. 1st run 4.1sec 2nd 4sec and 3rd run 3.9
Hope these photos may be of help.
bulletproof