Just my own thoughts here, but a single weber 32/36 is a little too small for your 270. I think they are rated at like 220 com (at 3" of mercury which makes them even smaller at 1.5 which is what the 4 bbls are measured at so probably around 170) A pair of 74 pinto 5200 Holley/webers would work pretty good and not a lot of fuss setting them up. I just put a pair on a 261(265 with the bore) that I just built and they ran terrific right out of the box. As for a cam, try calling Schneider cams in San Diego. They are pretty good to deal with. They can re grind your cam or may have a core to grind a new one. You get to talk to the boss, tell him what you think you want and what you are doing to the motor, and a few other details, and you will get a recommendation. My Schneider sounds really great, runs really well, and broke in without any problem what so ever.
