Model code 13018 for 1970 V6 (13016 = 1600 XL, 13014 = 1600 Deluxe)
Engine code P, trans code X for 4spd (not sure auto code off top my head)
Cross member 3 bolt (4 cyl 2-bolts per side)
Triangular gusset as Jason said above
Battery inset into engine bay skirt LHS for Bigger v6 battery
Shorter spacer between bonnet slam panet and radiator (v6 longer than Kent 1600).
From subframe in front of sway bar corner bracket has double skin strengthener all the way forward (4 cyls stop immed front @ sway bar bolts)
Brake lines run high across heater plenum box (I see this one still has the outer tabs for this, but compliance plate looks like it would be under the brake line usual position).
Speedo has 70mph at 12-noon on dial, with tacho showing redline at 5800rpm (not 6000rpm for 4 cyl) and has
x100 V6 printed on face
Atlas rear loading diff on V6, 4cyl has front loading 'English' axle (can remove pinion/crownwheel from front).....and wider rear brake drumss too
V6 has 13.5 gallon tank - looks fatter in the boot (more rearward intrusion into boot space)
Enigine bay wiring loom is different to 4 cyl (foor location of things...)
And if this is truly an early V6, then normal production differences might explain brake line (re)positioning to later ones. For example, the seat belt tunnel mount bolts - later ones moved to side of tunnel, early on top.
And 1969 models had the b-pillar seat belt mount @ shoulder height, later 70+ moved head-ish height.
Paint looks pretty good in the pics but you would inspect before buying of course.
And....IMHO, Redbook values are a bit optimistic across a number of vehicles in todays marketplace.