I have a modified FJ40, chev 350 etc. Currently has open diffs and fiddle brakes on the rear. I have found a few occaisions where i really need more directed power on the front end, one wheel spins so the other dont bother

LSD - expensive.
Welded front diff - dont like the sound of that!
Lockers - dont have any on board air etc and expensive.
So... fiddle brakes on the front also is what i am swinging towards, however i often have inexperienced passengers who wouldnt be capable of pulling the right ones at right times (and i like to be in control

My idea would be 2 pedals along side accelerator, one for each front wheel and the fiddle brakes (handbrake pos'n) for the rears. The two pedals in a pos'n like a tractor where you can push the both together. Would also adjust rears to allow pulling together.
This would mean heavy braking on all four would be a bit of a mission though.
Opinions on this setup, or feedback on someone using a similar setup would be much appreciated!
cheers
Lee