Inliners International Forums General Discussion MOPAR school me up on flatheads

So I have spent a lot of time since 1974 learning about 216/235/261 and the GMC's. I have them figured out. But I would like to learn about the mopar flatheads. Where do I begin? for starters what are the preferred engines and what vehicles are they in? Im thinking the 265 Chryslers have to be like the 302 GMC's???. Please advise