hank, I am going through the same process and to awnser yor question, You cant...The reason being is that you will pull the rocker studs out of the head with the roller rockers...hence the reason for the conversion. I have looked at pinning the rocker shafts as an alternative but if you were to do that then why not go all the way and convert to 7/16 studs....
talk to twisted6. He is VERY VERY knowledged on this.
jack S
