That is one nice looking Crew you have there. Makes me miss my 60 Oroville Specialty Co. F250 Crew Cab i had back in the day. Will be looking for a replacement and a couple newer ones to add to the collection.
I say go with the 6BT when you get tired of the 390. Put the 390 into a hot rod or something.
As an aside, anybody remember the episode of the Knight Rider TV show where a Green dent or flaresided Ford Crew cab 4X4 jumped over Kitt? Got to watch them film that scene and it was AWESOME. Also reme.ber right after the landed n wrecked I looked behind me and saw the same truck driving down the freeway. What are the chances? Remember hoping that it was coming up to redo the shoot . Glad they didn't cause it would erect a beautiful truck and I believe that's where I fell in love with the crew cabs .