i emailed Indy a few weeks ago and asked about the LA-X and the MA-X heads. They don't have them now, they don't have a supplier. They said hopefully next year they will get them going again.

I just got lucky and picked up a set of Indy X heads done by IMM engines when I picked up a core 360 motor. I was going to run some aluminum heads but since I just got these I will run them. I don't think any OOTB aluminum heads (besides Trick Flows) would flow as well as the IMM prepped LA-X heads..