235 never had full flow, 261 started in '59-'62.
I'm running a filter from a '60 261 (wish I'd got the engine, too, but it's long gone now). I've got it plumbed in with 1/4" steel brake line, bushed up to the 1/2"npt on the housing. Still set up as bypass. I carry around 35-40 psi at idle, up around 60 or so at cruising speeds. I'm also running a FilterMag on the housing, too.
