Stromberg WW Qs

I'm rebuilding a Stromberg WW 3-272 for installation on my 225 slant-6 (auto) and have a few questions.

• What jet size is appropriate for my engine? Stock, with a 6-1 header.
• What's the formula/process for selecting Jets and power-valve?
• Are any parts interchangeable with the 97 (which are still being produced)?
• Any performance/tuning tips?

Thanks all!
-Chris