injecto pump swap

can an early model injector pump (the 1 without the electrics) be fitted to a late model engine (with edc or is it ecu?) on a 300tdi? i ask as i want to run on veg oil but understand that the ecu/edc has issues with this. the disco is currently running on heated vegoil and has done for the last 20,000 miles (a little grumpy but nothing major). its now packed up and i was wondering what is the best option. Reconditioned engine but an early model 300tdi, or a later reconditioned engine with an injector pump swap. will either engine have to come from an auto donor as mine is automatic or can a manual engine fit into an auto gearbox. thx

seeing as no one else has answered I will have a go...
short answer...given the time, tools, skill etc you can do anything...
I don't see why the older injector pump shouldn't fit a newer engine, but you would need the accelerator cable from the donor, the edc pump was fly by wire...you may also need to do some re-wiring....

Yes, you could use a donor engine from a manual, but you would need the torque convertor and the bell housing from your engine