3 for 65/6. 2 on the left fender skirts (one visible in the fender cutout) 1 on the right fender skirt.
67/68/69/70 2 were stamped (complete VIN stamped in 69, incomplete VIN in 1970), also on the dash plate from 68 on.
67/8 stamped on the left/right fender skirts, 69/70 stamped on the tower plate under the fender.
Shelby's I have seen them in different spots (& untidy) especially during the changeover from the LAX facility to AO Smith.