i couldn't find a 10 mm left hand tap, so i just ordered a 3/8". just a little smaller, but then you can use studded heims. dont use the cheapo $4 ones though. call rod end supply and they can add a stud to any heim for about $1.75 or something like that. i got the nice chromoly ones for only a little more than those cheapo ones. i am about to order a 7/16" left hand tap set so i can use those too, just have to drill out the stem and spindle tie rod holes.