32&gtgk

I'm buying a Warwick pro fet 3.2 head soon and was wondering how much power (in watts) does the head have into 8 ohms? I know it has 300w power into 4 ohms. I'm thinking of buying Gallien-Krueger cabs to go with it, the GK 410 BLX and the GK 115 BLX. Using these cabs, is it safe without damaging...