I know Smoljan made 3x2 open plenum intakes for Studebakers just like that, but those port angles look wrong...could just be the pics.
You guys should know that the Studebaker motor was designed by the same guy that designed the Caddy........With slight elongation of two bolt holes the manifolds interchange. Just a little trivia from an old man...........Been there, done that, got the Tee shirt........
Orange Cove, Cal?!?! It shouldnt be to hard to track down info on that, theres only about twelve people in Orange Cove.
Listed as Studebaker in 1962 Newhouse catalog, small Smoljan ad in back pages of HRM around 1959 for Cadillac. I had one years ago w/ carb flanges machined for marine use.