Jack,
Where have you been hiding, Robert Yates has been making canted valve heads for Nascar Windsors for a long time. Blue thunder and Brodix also make canted valve heads for the Windsor. Only trouble with them is they are not good low rpm heads, they make lots of power in the high rpms but for the average street and sometimes track racer the inline valves are a better choice. Remember when the Boss 302's were kicking butt in Trans Am but the Z 28's were the quickest on the street and dragstrip. Ford even reduced the valve size on the Boss 302 trying to get more low rpm power. Lot's of guys make the mistake of going too big on the valves and lose bottom end. You would have to agree the Chevy guys have been doing pretty good with inline valves for quite a few years.
With the FE's you don't get many choices with Cylinder heads but with the Windsors you have lot's to choose from. Of course not as good a choice as Brand X but were getting close.
Cranky
