I have 2 newly rebuilt 2463200 casting 383 heads. They were from a 63 Dodge. They are the pedestal mount type for the rocker shafts. Long story short the machine shop lost the rocker shafts, rockers and pedestals. I sourced out some of the pedestals and thought I could use a later model BB rocker shaft. Turns out the shafts that I had on a later model head were too big around to fit into the pedestals. So what am I looking for? Do I have to find the shafts and rockers from the early pedestal style head only? Thanks for any advice.