Of course the same thing was also done on a/c like B-36, C-123, C-119, P2V etc, in versions which had both jet and piston engines. The planes didn't have two separate fuel systems, the jets just burned straight AVGAS in those cases.
Joe
What about the Shackleton ? It too has 2 jet engines as well as four Griffon IC Prop engines
Armstrong Siddeley Viper Mk.203 turbojets - used primarily for Jato from what I can see
Anyone any ideas ? Did they use Kerosene or AvGas ?