Long range flight with rear engine only

[proto]

Dear Gentlemen

I had a C337P for years in the 80's and then I stepped up to the bigger cessnas and TP.

Recently I aquired a additional aircraft: The '68 T337C for one reason - to fly to Africa. The aircraft is actually in his annual check and will be equipped with a ferry tank.

Here the story: One owner of a similar aircraft told me, that the range can be incresed dramaticaly flying with the rear engine only. It means to feather the front prop and to fly with a speed of some 130 KTAS. That guy did this to fly to Lebanon in the 90's.

Now to my question: I did not find any notice in the manual. On the other side, the proposal make sens, since in level flight one engine can do the job. Has any one the answer ?

Thank you

PROTO