I have just found a company near Leeds that will rebuild the Getrag for around £600, apparently they specialise in strengthening them for the uprated Supras etc.
They reckon it should then be capable of handling 450lb/ft and they are offering a 2 year/24,000 mile warranty.
This sounds pretty good, any bad reports about these guys?
http://www.cleckheaton-gearbox-centr...k/about_us.htm
Warren