Man I hope that D- 200 has power steering.... GTX you right..that truck was restored right! I'm suprised that 318 can even move the truck! I'd expect a BB in there....
For what it is, I think that poly 318 is more than enough (especially with the external mods I see: 4-brl induction, headers, electronic ignition, etc. I'm sure there are a few internal changes as well.