Are these two engines interchangeable?

Question

My husband has a 1984 Ford 6.9l diesel and a 1993 Ford 7.3l diesel. They are both international engines, and not direct injection turbo. Will the 6.9l drop into the 1993 ford ?

Answer 1

The answer is more than likely.  Unfortunately, it is pretty much illegal everywhere to put an older engine into a newer vehicle uless that vehicle is going to be used off-road only.

Chiltons and Haynes repair manuals cover these vehicles.  Most will say whether certain engines are of the same family or not.  Visit your local library and read up on it.

Both engines were made by Navistar for Ford, so there is a good chace they are interchangeable.