is the driveshaft the correct length ? . That is a question that seems hard to establish. i know that there are auto and manual sizes , and also different lengths listed on autodoc under their manual or auto separate sizes. Now the question is which are for the 75 , or zt or contempory models. Dont forget that these cars had different suspension set ups .some with shorter shocks and springs to others . Looking at lengths of driveshafts some are only a few mm longer or shorter than others , but why ? Must be a reason to alter them i would have thoght. ..