I am doing a 5.0L/np435/np205 swapp and I am trying to figure out what drive shafts I should use. I have heard that 80's broncos CV shafts are fairly good to use. Any suggestions? Are the Universals the same as on my NP205 and I have the '90 YJ stock axles (I know need to be changed, next on the list) I beleive they are D30/D35c.

Dude, just call a driveline shop. It is pretty basic.