I didn't know much about these heads in general when I got a pretty good buy on them. here is their link
http://www.worldcastings.com/prods_pages/053030.htm
TFS-51402000
Good idle, strong midrange power. Aftermarket intake, heads, and headers recommended. Requires modified mass airflow.
Compression: 9:1 minimum
Duration Cam Lift Valve Lift with Lobe
@ .050" 1.6 Rocker Separation
221°/225° .312/.319 .499/.510 112°