Hows it going,about the w58 gearbox i heard that if you can find a W50 cast iron gearbox then its good to keep it because ites very strong??? not too sure tho as you say the W58 is the same gearratios but lighter ally. which would be good. anyway i found some studd on trademe (like ebay here in NZ) i found a toyota supra 1982 which is being wrecked
http://www.trademe.co.nz/Trade-Me-Mo...-183956071.htm
And a Hilux/hiace diff
http://www.trademe.co.nz/Trade-Me-Mo...-183533621.htm
The Diff head looks promissing but i;m not too sure for sure, the axels on the other hand the seller does not really say what year they are from so its kinda hard i guess ill have to keepp looking haha.
On the other hand one of my mates recons i should just wield up and lock my current diff for the summer. lol