The primary spot for the seals to leak is in each corner where the LIM, heads, and block meet. Use a small dab above and below (in that corner), all 4 corners.
Consider sending your failed UIM to Bob Dillon to be sleeved and given to another needy member. He'll pay shipping.
I didn't question you on the heads, as you sounded confident and sure of yourself in your first post. But I have to tell you I've seen only 2 head gasket failures on this forum of 5000 members in 3 years. And one of those was questionable.