Summit's 340/360 to /6 K-member conversion Kit 60$ (Thumbs up)

Its probably easier and cheaper to just buy the kit then to track down the truck mount and modify it.

It could be, if there are no junkyards around I guess. Plus you still have to buy the left side 318 mount also, so if you have none of that, the 60 dollar kit seems like the way to go. I allways did my own cause I had that junk laying around, and cutting and welding a mount was no big deal to me.