If you don't mind buying new pushrods you can fix it now. Those rockers are a bit different than a roller tipped rocker. You may want to send Mike a picture of what you have and see what he thinks.
The picture I posted was before the shims. I didn't like the angle of the rocker pad on the valve stem. I thought it should be a bit closer to level. The only way to do that is to shim the shafts up, grind the valve tips, or grind the rocker pads. The pushrod checker is in the photo. I wanted a few exposed adjuster threads on both ends. If you jack the shaft up it takes a tiny bit of angle out of the longer pushrod also. I wasn't too smart and I didn't compare valve length between the stockers and replacements. They almost look too long.