My girlfriend has a 1991 Chevy C1500 standard cab and wants an after market stereo. I have done installs before, but, im a little leery with hers. As I think all of the trucks of this year it has the stereo over the air con./heater and then a tape/eq in the center of the dash. I have a install kit from Metra for it, and a wiring kit. Is there anything else i need to know before starting this? does anyone happen to have a master build sheet from Crutchfield i could get a quick copy of, or is it pretty simple? Thanks very much guys, since we are getting married soon, it will be my truck as well, and i am excited to be able to share my joys and heart breaks of getting to play with her truck. Hope I can buy her a new car soon.... so i can have the truck to my self!