Right now I am running a "worked over" one bbl. A two stage two bbl would work, and dual ones aren't that bad to keep tuned. Bigger problem is those leaky rochesters. Inliners has a good tech tip on reworking the ones. A four bbl in the 390-450 range will work on a 235.
As for the valve lash, I can't find my card or my notes. I recall talking to Patricks, set the lash per his instructions, set the timing with a vacuum gauge, then hit it with a timing light, it was at 4 degrees. That was good enough for me.
