Reasons why your engine went out, was because of the Fuel system you are trying to use. Stock Injectors, High speed runs, Walbro or Denso pump= disaster! I killed two engines the same way. Also Stock twins dont like that kind of heat. You need to understand that Walbros and Denso pumps supply no more then 50 psi of fuel pressure for a short period of time. Both of those pumps will keep the engine happy for a little bit, but if you had a fuel pressure gauge in the car, you could see the fuel pressure jump at the sign of boost and slowly back down to 40ish psi of fuel pressure.
Look at all the big wangan cars, they all have overkill fuel systems. Most have pump(s) that supply 400 lph @ 75.5 psi of fuel pressure. If one of those pumps with 440 cc injectors where used, today your engine would still be alive to play another day. A 2jz will not solve the problem, find a solution to it first.
I'm not coming down on you or anyone else, I rather see people do it right then to see this kind of thread happen over and over again!