I'm not sure if I should post, I'll probably get yelled out. i THINK the heads are interchangeable but you also have to change other stuff, ESPECIALLY if you put a SVT head on.
98.5 SVT
91 Escort GT (almost sold)
96 ATX Zetec (i brake to watch you swerve)
FS: SVT rear sway bar
WTB: Very cheap beater
CEG Dragon Run - October 13-15
i THINK the heads are interchangeable but you also have to change other stuff, ESPECIALLY if you put a SVT head on. 
