So reading cloudbuster's post... sparked up a question. I've read a lil' about the 302 heads put on the 289 in late '68. Is there anyway to tell if an engine has those heads without taking off the valve cover? My girlfriend is selling her '68 mustang. I don't know if the engine is original, but I'm dying to know if she had the 302 heads. Another question... did those heads come with roller-rockers?