Complete auto box with flex plate torque and matching starter with metal joining gasket

I have had 6 starting motors and a supposed matching torque.flex .starter and none will give me a meshed starter to ring gear . Great shame as box and transfer and all individual bit work perfectly ,just not together.
So rather than keep trying with individual bits the whole unit has to be answer.unless anyone can suggest how to solve the problem .
Its the red 3000GT 1993 Z16A auto 4WD 4WS .