Love your Mk1. I agree with everyone, it looks so much better with 10s than 13s. Those wheels are great and the car would be great with some gp2 arches. Alternatively, you could get some D1s (I quite like these) or some 4.5" S steelies.
Nice choice with the Cobra RS classic bucket seat. They suit these cars perfectly.
What is that strange cut out in the body on the right side of the rear panel?
Yeah the Mambas don't have the best offset... I might go with flairs. We shall see.
That funky cut out is someones idea of an antenna mount! A lot of work and well done. I hate it though haha