Hi a friend is after some motorsport engine parts to suit 250 k a complete head,would be nice,but he mentioned some thing about 130mm centres for studs.left side cover with good complete clutch actuator /lever in place,does the lower bush wear out ? His is worn at the lower position.prefer the 250 bits,but complete 350 engine as option.Don't know his ideas on what use it's going to get but any leads would be great.ELC hunter.