Preamp tube schematic for Big Block 750

I have a Big Block 750 coming to me. I wanted to see a schematic for the tube layout in this amp. I was planning on using a mixture of tung sol, ruby tubes maybe others to customize the tone how I like it. I have been reading http://www.12ax7a.com his explanation makes since. You can tube roll randomly and see what you like or know where you want to go and put tubes that perform how you want in the positions you want. Any help or ideas would be appreciated