Karl,
Do you have a manual for your lathe? If so, page 15 onwards lists the range of Imperial and metric threads which you can create by fitting different changewheels driving the screw cutting leadscrew. You do not need a conversion kit, just a few changewheels and possibly a stud to fit an additional changewheel. Parts are available from Myford or other sources.
If you do not have a manual, pm me your email address and I can send you a copy of the relevant pages tomorrow.
I use tailstock tap or die holders for almost all of my threading.
Gordon
Edited By GordonH on 24/03/2019 22:25:44
Edited By GordonH on 24/03/2019 22:48:14