Morning People,new to the forum.
Rick Here.....
I am looking to replace my battery with an Optima Battery.
I own a 2003 anniversary edition Vett.

will this battery be a direct fit?or will I need something else for it to
fit in the tray??
which Optima do you suggest?I am currently looking at the Red Top...

Thanks,Rick

Hey Rick, I too recommend the red top Optima. They come in all different shapes and sizes so check with your local parts store for the proper fitment.
EDIT: Actually, here is what Optima's site says you need.
RED75/35 Optima 75DTO
Height Adapter required.
The height adapter USUALLY comes with the battery but check with the place you buy it from to make sure.