But in 1972 the road outside their garage had to be widened and they were forced to close .
The design evolved over time and by 1971 about 170 kits had been made and they were up to GTM 1 - 3 ( model 1 , variation 3 ) .
In 1972 the road outside their garage had to be widened and they were forced to close .
The design evolved over time and by 1971 about 170 kits had been made and they were up to GTM 1 - 3 ( model 1 , variation 3 ) .