Hey guys I'm after some opinions please.
I have a 5 speed manual box in my 2000 model gu at the moment which is on its last legs and needs a rebuild. I have converted from the zd30 grenade to an ls1 and would like to know which option would be better long term.

First idea : rebuild my current zd30 box and install the bigger/stronger 5th gear. Was also going to install the marks adapters 5 th gear over drive ratios.... Currently the car sits on 2600-2700 rpm at 100km/hr.

Second idea : remove my zd box and purchase a second hand 4.8 petrol gu box which would already have bigger/stronger 5th gear. I've also been told the 4.8 boxes have a lower 5th gear ratio...... Which would save me buying the marks adapters ratios for the zd box.

Which option do you guys recommend. I am in no way looking at building a race truck, just want a solid reliable gearbox more suited to touring and towing a van.

Cheers guys