300 turbo rear end into 240 d 4 speed stick?

kent
1980 240 D standard shift. fresh rebuilt engine. clutch..driveline brakes..etc. pleasure to drive. runs great.

i have a couple of turbo diesel parts cars available..that were known running with no issues (one with recent new axle shafts) would it work to remove the pumpkin from one of the turbos and stick it in the 240. it would seem that the higher geared rear end might be an advantage as far as gas mileage and engine wear. my average cruising speed is around 65 with mostly hiway driving. the axle boots look pretty rough...so i will probably be good time to make the swap when i do them.

what are disadvantages? advantages. anyone else ever try this? good idea?

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