What revs too high? A diesel revs too high for a 265 to tolerate? not likely.
My friend, the real problem is that the bellhousing won't mate to the engine (without major adaptation)--the starter bump is on the wrong side.
Otherwise, it would be great, I'm sure. (And I would have done it already, seeing as I have 3 of them sitting on my garage floor and a 300TD with an automatic I am bored by.
KenB