what for? My posts are carefully phrased to add up to 'it could be just about anything, but probably isn't'... I have no problems
since you ( presumably ) have a 500cc engine, I would stick to my earlier suggestion, that it is a Junior Scout frame, transmission and engine ( it can hardly be anything else, since all the other models have bolted-up, gear-primary unit with the seat post behind the gearbox )
forks, I don't really know. Don't appear to be correct for Junior Scout. Wheels, really can't offer an opinion. Tanks and mudguards appear to me to be much later repop items.
my original suggestion stands. Build it as it is and ride it. You will have a very distinctive bike, pleasant to ride in a period sort of way, and if people want to niggle, tell 'em to build their OWN Indian just how they reckon it should be.
Shoot, a man could have a good weekend in Dallas with all that stuff...