Is he a riding Junior or Senior ? Sounds a Junior so you are a year early.
He will have opportunities but for example if he gets a B in pre calc, it’s likely engineering won’t be suitable. It’s got a, depending on the study, 40-60% drop rate. That says he’ll have schools.
No shot at Purdue. An OSU or UMN would be a better reach.
Your likelies are safe.
UAH is safe.
Why no UK? Great engineerimg program.
Are you sure about Indiana residency. Is your son claimed on your hobby’s taxes ?
Btw high test score and low gpa isn’t uncommon. Testing doesn’t necessarily measure academic ability or drive.
I wouldn’t predict scores. Maybe your son will surprise you.
Either way he’ll have plenty of solid options - especially with this list.