For the record, here are pics of the clutch master firewall crack too. This is a mate's car and it cracked right through and needed re-welding. A stronger clutch pedal box and plate was made as well. All cleaned up and no more flex...
that clutch firewall crack looks the same as the one on my gsr which is sitting under my house without the motor in it. how much did it cost to repair and did you get any extra bracing put in?