Researching while I still have a few synchros left...

I'm looking into getting my gearbox rebuilt and adding an LSD.

I don't really want to just get all the exact same parts from Honda, because more than half the expense is labour and I figure I should use that investment to make a BETTER transmission.

If I'm getting custom parts, I want a closer ratio gearset with a higher final drive. I plan on using the car for low top speed events, such as tarmac rally/hill climb etc

I don't want a dog box and I don't plan on throwing any more than 130kwatw at it. Budget $2500ish for transmission.

Questions...

Who is well reputed for doing this kind of work in Melbourne, ie custom rebuild (involving custom parts)?

Straight or helical gears? Why?

Could I still use OEM synchros taking this custom path? Would I be better off getting custom synchros too?

Any other constructive advice or suggestions?


Thanks