i recently installed some manual side mirrors and manual crank doors to my firebird. they had been repainted and sat for a year before installing them. anyways, now i find that the passenger side mirror does not seem to have the same bolt pattern as the mirror bracket. im pretty sure it should use all 3 screw holes, only two match up. since the mirror glass is a bit tarnished im looking to get whole new bracket and glass from pick-n-pull. i do see post saying the 82-85 mirrors have a different bolt pattern than 85-92. my problem is i do not know what i have. i dont want to have to get an entire new mirror housing and repaint it. any help is greatly appreciated