Few Questions
 

I have a 90gt and wanted to get a grill for it now do I have to buy a whole new front bumper or do you just cut an insert the grill peice and also how difficult is it to install an aftermarket hood I assume there fiberglass?

You will have to cut the bumper a little bit for the grill to fit in. It should come with instructions on how to do it.

Yes, 99% of aftermarket hoods are fiberglass. You have two options when it comes to hoods... bolt on, or lift off. Bolt ons are better for street but they are more expensive. They use the factory hardare (hinges, latch, etc...). Lift off are for racing, they are less expensive, and they require hood pins. I have been told that lift off hoods are not that great for street driving because they will rattle when you go down the freeway... if you don't mind the rattle, then go for it.

Hey cyberstang is that an LX bumper on your GT I was thinkin about doin the same cause I want to install some stock pipes but was worried about clearance issues, I also love the look of the smaller rear bumper cause it exposes the underside and looks mean.

The front bumper is a Cervini GT Stalker.
http://www.cervinis.com/shop/images/334_1.jpg
The rear is a Cobra.
http://www.cervinis.com/shop/images/206_1.jpg