A Few Issues With My 518 Conversion??

I'm kinda torn. I've got to have OD with the gears I'm planning and the distances here. But I can't decide between the 518 trans or gearvender.

Ialready have a GV od unit off my F250, but to swap it to a 727 will be about 900.00. Or I can sell it for 1200.00 plus, buy a trans from the yard, build it up and go that way. Suppose I could sell the 727 too.

How hard was the swap? Big pain in the butt? Or normal swap crap?