Ive been told the Vin is stamped on the sub frame but on the two frames i cleaned the only thing i could find was a number on the rearward inside end of the passenger side frame rail . looks like a part number or sequence number but did not match anything in the vin

The complete VIN Is not stamped, they stamp a VIN derivative.

Looks like this 12N345678 for a Norwood car; 12L345678 for a LA car

where is it on the frame ? Is it the spot i found on the right hand frame rail on the inside in the back

There is no VIN derivative stamped on the subframe. The full VIN is on the dash (VIN plate); the motor and trans (if original to the car) have the derivative; and behind the blower box on the firewall (derivative).

The only things stapmped on the rear most driver side of the frame rail is a date code and manufacture stamping (mine has an "S"). It's been discussed a lot. Use the SEARCH feature to see old postings with tons of good information.

thanks guy this has been a big help