[67c10rustbuket]

Yeah that stinks, I believe here (oklahoma) and maybe federal law that chassis/frame VIN # overrides any other because the others are easily swapped. but they are always registered by the VIN on the body as mine was, I had to drive my non street legal or safe truck to the tag office and also go back to the shop to get my dash cluster so they could see the odometer but they never looked at the frame VIN. and i have seen correct GM reproduction vin tag rivets for sale i dont remember if it was on ebay or a resto catalog but you can find them.
Everyone should learn about their own state registration laws and the state registration laws you bought the truck from since this can cause a heck of a headache as i experienced with mine. apparently GA (where my baby came from) doesn't title vehicles from 198? and older just a bill of sale is legal but the one who gave you the bill of sale MUST have been the last registered owner by tag (license plate record) or else the bill of sale is worthless. I had to hire a title specialist to file lean paperwork with OK and GA state vehicle registration offices and wait a few months to get mine all straightened out.
then again some states you can drag a truck out of a cow pasture , walk into a tag office with a VIN# and get a builders title in a few days.
Please people when you go look at a truck take a wire brush (to remove the surface rust/paint) and get the VIN off the frame on the top driver side frame rail between the upper control arm and steering gear box. if it doesn't match the door jamb VIN have the seller write a bill of sale for the frame and have it notarized to cover your butt.
No I didn't know all this before I bought my truck but I sure will check my next one !
and for everyone if you didn't already know as far as originality 72 is the only year that the rear view mirror was attached to the windshield, 67-71 will have holes in the inner roof to mount the rear view, and 67 has different vent windows (extra holes and different vent handle) also the early trucks(67-68?) had a "hand" Ebrake under the dash. the later years had a "foot" Ebrake. there are a few other minor yet specific details that can help identify what year your parts and truck really are
I hope you find a new baby soon, and fight for the rest of the truck that wasnt theirs to begin with ! ,