I'm with the guys that said run away. That's based on the pics of the right side splice of the front end to the original frame. It appears to be welded only to the web of the original frame, with the flanges hanging out in mid-air (per pics 101 & 102). Yes, it could be repaired, but is the original frame still straight? How much would it cost if it were tweaked? My thought would be that the questions are just too big to risk finding out how much, and whether it's actually dangerous to drive.

There will be other trucks available.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.