The various locations mentioned to you in part were uses on various manufacturers on various cars. .
re mopars 6bbl's 2 locations, I agree.
I did know several drag racers that got original M code 1969 1/2 R.R. six pack cars, they had the full VIN on the dash pad, the fender tag and on the left door post tag or on the left door decal.
I'm not sure about the radiator core support having the full VIN or just the sequence number on those cars.
I do know one guy the back half a old 1969 1/2 M code six pack 4 speed drag race car to sell it faster instead of removing the non stock welded in suspension parts on the rear sub frame of the car
I'm pretty sure the new owner back east got after him legally about that based off of the incorrect number on the rear sub frame after he got the car delivered to him
