Most old race cars are like Trigger’s broom. Twenty new handles and twenty new heads. Racing, by its very nature, is hard on machinery. Notwithstanding crash damage, components wear out and metalwork hardens due to flexing, and starts to crack or even break. Even bodywork, especially aluminium panels, can split. Furthermore, most racecars were only built to last a season or two. After that, many were either clapped out or no longer competitive and either scrapped or stripped. No one at the time envisaged that some of these cars would be racing in 30, 40, 50 or more years later. Consequently, very few historic racing cars are truly original, as they raced in period. The lucky ones were covered in a dust sheet and shoved to the back of the…