the best box as far as i know is the mr30 skyline stumpy 5spd.... reason is that u dont need to move the handbrake as with the original ca 5spd.... and in a ute theres no room to move it back.....

some say it fits in the tunnel... some say it doesnt... putting in a bigger tunnel will allow easier access to starter motor etc for future service/maintainance.....

but if you want to avoid that i'd just get the desired gearbox and see for urself if it'll fit....