i personally like the 86-88 front bumper with 89+ steering wheel and indicator stalk
89-92 has a wholeeeeeeeeeeeee 2hp more
89+ lights are the sweetest lights... get rid of those pre 89's if you get an 86-88 hehe
check for sale forums on supramania.com, here and supraforums.com
you may get lucky
(and if you do decide to replace the hg with a metal head gasket don't forget to machine the head and block surfaces
)