idk what your chances are, but I would definitely NOT send your scores if you do not have to. If you do not send scores and they have to make their decision based on your excellent grades, you will have a much better chance imo. My son got into Cockrell last year (he’s class of 2020), but he did not get his 1st or 2nd choice major (ME/EE). He was an auto admit with a 1410 and 14 AP classes, and he got put into civil engineering. At UT it is exceptionally difficult to transfer majors even if you are already in engineering, so getting into a competitive engineering major like aerospace will depend on whether they have any spots and how many people are trying to transfer, etc. My son was told that if he went to UT and started in civil engineering, even with a 4.0 it would be difficult/unlikely to be able to transfer to ME. So, you have to consider that other engineering students already at UT are trying to transfer from something less desirable (civil/petroleum) to ME/EE or aerospace as well, and they have the advantage of being able to apply after their 1st semester, so spots get even more scarce for those transferring from other schools. I’m not saying it is impossible, but just be sure you have a back up plan or you are ok staying at Iowa. If you are trying to get to the state of Texas, I bet you could get into A&M, which is also a very good engineering school. My son got into several better engineering schools than UT (Illinois, Purdue), but UT is the ONLY school where he did not get his major. He is a freshman at the University of Michigan now. Go Blue 
Good Luck & Congratulations on doing so well in one of the hardest majors–my husband got his degree in aerospace engineering.