[cosworthfreak]

The small build plate should have the chassis number stamped in two sections.

For an original 1600GT, you would have CK17JE in the top left box on the plate, then 5 numbers stamped in the next box to the right. Together, this will be the complete chassis number.

This should also be stamped on the highest section of the slam panel, to the rear of the bonnet locking mechanism.

There should also be a number stamped on top of the drivers side shock tower. This will be the car's original engine number, and won't resemble the chassis number (nor is it stamped on the build plate from memory).

Any photos you had would help.

Cheers
Jamie