Yes its very easy to swap an older four eyed stangs into the 87-93 style, but like Twister said they are nice for shows, they are getting rare cause of people converting them to the newer style, but since you have the back half converted, you should get the side ground effects from 87-93GT, and leave the front how it is, that will look good too, but if you go through with the conversion then just grab the complete front clip off of an 87-93Gt.
Jim
__________________ Pulled up to the light the other day and a 3 year old on his big wheel looked over at me and then at the light. I knew that it was on. The big wheel was hooked up, rims, sickers,ground FX, the works. Just before the light turned green the little ******* pointed to the NOS sicker on his machine and left a plasic patch that lasted about 100ft. I didn't stand a chance, I was smoked. He rasied his fist in victory and when home for milk and cookies, I just went to the track. :rolleyes: | 
83 front end swap ? 
