Actually the engines in the old t-100 Toyota trucks, can hold a suprising amount of boost on stock internals. I have actually seen someone put down almost 400WHP on one of those trucks (Turbo of course). The Engine code is 3RZ-FE, it is a 4 cylinder that is 2.7 LITERS. The one I saw was the one with the distributor, not coilpacks like the ones that come in the newer tacomas.