FLYBOYJ
"THE GREAT GAZOO"
From what I hear, they think they can shoehorn a Viper motor in a -39. I'd like to see that.
The only guy I'm aware of doing engine swaps on -39 is a guy out of Chino Ca. named Steve Kalmer. I don't know what he was attempting to do but he advertises it on his website.
A viper in a -39 is a big undertaking. In a -29 it's not that difficult since the aircraft first used the viper when it was being developed.
Where are you located?