SpeedMaster Head- Rocker Options/Questions

Agree with the above, and talking it over with Pittsburghracer.
And my meager two cents:
Like BP mentioned, any time you've got worked heads, new rockers, who knows what deck height, and whatever gasket thickness you'll use to get the compression ratio that you want; you almost certainly are going to need custom length pushrods.
Don't forget to use steel shims under the springs- high pressure springs can mess up the aluminum seat in a hurry.