3.9 conversion to 4.0?

[bmwrovers]

I'm thinking of converting a tired 3.9 engine to a not so tired 4.0... any ideas, comments, advice? don't have the 3.9 yet but have my eye on a nice truck in the south. Just looking for advice before purchase.

thanks,
mark

[Rob P]

no idea if that would work out...........Etown Trevor?