At the early races the cars were little different from the 1976 specification cars, indeed two of the 1976 cars (chassis 026 and 027) were used in the early races.
Nas primeiras carreiras os coches non eran moi distintos aos coches cas especificacións de 1976, de feito dous dos coches de 1976 (chasis 026 e 027) utilizáronse nas primeiras carreiras.