Fresh engine, wiped cam? Tick? (new pics added)

If you have a spiral bound notebook or the package backing from rtv thats made of thin cardboard they all seem to be .027"-.030" thick. you can cut 4, 1" squares in them, punch or cut a 3/8" hole in them and then install two under the shaft at each hold down point...you will then have accomplished a poormans check of your pushrod length.

If they are now snug, your pushrods are a little too long and you need to shim the shafts up to compensate or replace the pushrods with the correct length...shims are cheap but the new pushrods are the right way to fix it. Shimming the rockers up will slightly change the geometry at the valve tip...in your app this is probably not an issue. This is far more important in a high lift app.

If they are still a little bit loose, remove one piece of cardboard from each bolt and resnug them. If the pushrods are now snug, your pushrods are the correct length.