I never took the ACT/SATs but then again I wasn't college bound either. I took the military route.
Although all services score the ASVAB differently I was qualified to do anything I wanted to in any of them.
What's funny is in 2002 I re-took my ASVAB for the air force. I was worried being 6 years out of high school that I'd do worse. I actually did better on them. The recruiters were surprised because they hadn't met too many smart Marines in their lifetimes lol.
I wanted to do something more high speed low drag like space systems command or somthing but I got stuck with mechanics. No worries here though...I like the simplicity of mechanics...you turn it left it gets loose, turn it right and it tightens.