70 duster

okay so i ran into this a few days ago. its got a freshly rebuilt supposedly with 0 miles hasent even been broken in yet 340 demon motor bored .60 over tunnel ram 2 holley? 650 carbs msd ignition box b&m ratchet shifter 904 trans, 509 purple shaft cam, headers, claims 500hp. it was originally a /6 and has drums and a small rear end. it does have rust so far that ive seen some in the floor pans and a few other places. as you can see its had body work done and needs more. says it needs new high torque starter to run and a battery and radiator fan. the interior also needs work. hes asking $3000 for it. what do you guys think about it?