Lenght of Rear Body on a Series 65 Roadster

The left rear body on my CAN made Roadster is 1 cm (3/8") longer than on the righthand side, whilst the US made car has identical sides. Does this come as any surprise, has anyone encountered this before? As pictures show the car is in a final bodywork process and the difference might lead to cutting up either the fender or inner fender/body profile to make things fit.

i saw a older program of american hotrod and they had a similar problem with measurements when making the floorpan-they built it square and had to trim to make it fit.just saw show friday maybe you could find on the velosity channel.good luck.t.nugent roa 12969.....