Remember when you start moving the heims..... in and out of the control arms....... the rule........ is
1.5 times the diameter of the threaded part of the heim.....
In other words..... a 3/4" Heim is threaded at 3/4"X 16...... 1.5" long..... so you have to keep the heim threaded into the control arm or any piece the heim is threaded into 1.5 times ....=.... 3/4" + 3/8"...= 1 1/8" screwed into the control arm .....
That's a safety thing and strength.....
We don't want any heims or control arms breaking....