-Matt
The 3.4 is made for forced induction it shouldn't destroy the engine.
The "Z" in the engine code 5VZ-FE stands for forced induction in Toyota engines.
If it's in the first group, it's not factory installed but was designed and built for forced induction.
If it's in the second group, it's factory supercharged. For factory turbocharged, the letter "T" is used in lieu of the letter "Z".
examples:
4A-GZE is an A-series engine with DOHC sport cam angle (G), supercharger (Z), and EFI (E). 2L-T is a L-series engine with turbocharger (T). 1KZ-TE is a KZ-series engine with turbo (T) and EFI (E). 1KD-FTV is a KD-series engine with multi-valve (F), variable nozzle turbo (TV).
hth.