Darrell,
Good luck.
I don't think one can ever look over dressed for a job interview.
You only get one chance to make a first impression and why not make it the best possible.
Relax during the interview.
Get friends to do a mock interview and surprise you with questions.
Be prepared for the often asked, "what is your worse quality/trait".
Most screw that up. Turn a negative to a positive. Tell them your worst trait is you seek perfection and recognize not all things will be perfect but you can have a blast trying.
Speak of experiences where you have shined.
Good luck!!!
Whatever you do, don't mention your "meat packing" days.
