do you need hold down for uplift?
rod into post works pretty well. you can use a timber barrel style (like the timber lynx) and run the rod into epoxy in the masonry.
if you want to screw / nail it - you'll need something coming up the sides, or you'll need a knife plate design.
maybe check out this thread:
http://www.tfguild.org/forums/ubbthreads.php?ubb=showflat&Main=3313&Number=19852#Post19852lots of options - but they depend on your engineering requirements...
