The headers (or header in your case) make a BIG difference in power. If you got with an intake/headers/exhaust you will prob gain about 20-25hp. I was going to say it could be the cruise control cable....mine wasn't working after i did the 3500 swap...popped the hood...saw the cable was off the throttle body and popped it back on...problem solved. Prob the easiest "problem" i've ever had to fix
Glad you're enjoying the forum....hopefully we can convince you to keep the Alero!

Too many people on here getting rid of theirs for imports....not good!
