I would like to do them like your offset rocker deal, but if I start that, I would never get this running. I just can't seem to get as much done in a day as I used to...
Tube the pushrod holes (kiss the tube) and the common wall holes, and a 2.05 valve with a nice 60-45-30-15 valve seat do the needed porting and put them on. Or do the above with 2.02 valves if you already have them and go have fun.