Try a search every once and awhile before you go starting posts. Alot of material on this site if you spend a little time looking. But I went and did some work for you and found a thread that is month or so old. If your Heatwave has some size to her I would say go for it. Amen I raised is a stud. Only thing is has tick of attitude and needs tick of frame.
Here is a picture of a Amen X Mossy Oak calf at 3 days old. I don't think he downsized at all. This heifer was very much full of life when she was born and hasn't slowed down since. I think she will make a nice heifer that will turn into a good cow.