@momofsenior1, I don’t know if things have changed dramatically in 5 years, but my son was offered $100,000 merit aid at Case. He didn’t attend, but in pure dollar terms, it was his best award. At the time they had a reputation as being generous.
Back to the OP, for schools like Lehigh that might give high awards, that’s going to be tough. The more selective a school is, the less likely it will be that a 3.9 will get a high award. I’d look at Case due to its affiliation with CIM. Eastman at Rochester and Peabody at Hopkins are others in that realm. I doubt any of them would be affordable though without substantial need based aid.It
Before wasting time and money on both SAT and ACT, have him take an online SAT/ACT diagnostic test. Usually students favor one or the other. There’s rarely a need to do both.