I think some of you would be dismayed at the expectation expressed (Jalopy Journal, etc.) as to how much power will be added to a 235 by a 12 port head. I've seen guesstimates as high as 100 hp, with no details as to what other mods done.
Do a search, you'll see that the to-do list includes
high compression pistons (no ratio given, dome shape unknown, $$)
3/4 cam (I need not elaborate, meaningless)
high ratio rocker arms (no such thing exists currently TIKO)
individual manifolds (made to order)
magneto (because they used one in 1948)
tuned exhaust (made to order)
fully balanced (as opposed to)
H beam connecting rods (source, length, pin size?)
Note NO specifics, no dimensions, no data, just categories.
I applaud and encourage ANYONE modifying an obsolete engine because they want to.
I'm slowly accumulating a future article or book (depending on demand) on L6 flathead engines, including, Chrysler Spitfire, PlyDo, Pontiac 239, Hudson, Studebaker, Rambler, Olds. The block itself is remarkably similar in design with each other, and with OHV engines of the same period.
