for a choice of larger brake master cylinders, ther probably isnt a large choice, as the four mounting points that go through the firewall and hold the cylinder to it are closer together that current toyota setups.
the only solution i could find was to redrill the mounting holes larger to suit a ae92 levin and then strengthen the firewall. it may not have been necessary and was a bit of a gamble, but 3000km later everything still is working perfectly. and only one small section of brake line had to be made.
ill see if i can take a pic and post it this afternoon.